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1

Reversing the Circulation of Magnetic Vortices  

NLE Websites -- All DOE Office Websites (Extended Search)

Reversing the Circulation of Magnetic Vortices Print Reversing the Circulation of Magnetic Vortices Print In magnetic media, information is stored in binary form-one or zero, depending on which way the electronic spins are aligned in a given section of the medium. Recently, however, magnetic vortices have drawn scientists toward a new possibility: multibit storage in which each logic unit has four states instead of two and can store twice the information. Each tiny magnetic whirl has a polarity that can point up or down and a circulation that can be oriented clockwise or counterclockwise. Previous studies have shown that the polarity can be flipped on command. Now, using time-resolved magnetic soft x-ray microscopy at the ALS, researchers have shown for the first time how to use pulsed magnetic fields to reverse the circulation.

2

Reversing the Circulation of Magnetic Vortices  

NLE Websites -- All DOE Office Websites (Extended Search)

Reversing the Circulation of Magnetic Vortices Print Reversing the Circulation of Magnetic Vortices Print In magnetic media, information is stored in binary form-one or zero, depending on which way the electronic spins are aligned in a given section of the medium. Recently, however, magnetic vortices have drawn scientists toward a new possibility: multibit storage in which each logic unit has four states instead of two and can store twice the information. Each tiny magnetic whirl has a polarity that can point up or down and a circulation that can be oriented clockwise or counterclockwise. Previous studies have shown that the polarity can be flipped on command. Now, using time-resolved magnetic soft x-ray microscopy at the ALS, researchers have shown for the first time how to use pulsed magnetic fields to reverse the circulation.

3

Reversing the Circulation of Magnetic Vortices  

NLE Websites -- All DOE Office Websites (Extended Search)

Reversing the Circulation of Magnetic Vortices Print Reversing the Circulation of Magnetic Vortices Print In magnetic media, information is stored in binary form-one or zero, depending on which way the electronic spins are aligned in a given section of the medium. Recently, however, magnetic vortices have drawn scientists toward a new possibility: multibit storage in which each logic unit has four states instead of two and can store twice the information. Each tiny magnetic whirl has a polarity that can point up or down and a circulation that can be oriented clockwise or counterclockwise. Previous studies have shown that the polarity can be flipped on command. Now, using time-resolved magnetic soft x-ray microscopy at the ALS, researchers have shown for the first time how to use pulsed magnetic fields to reverse the circulation.

4

Reversing the Circulation of Magnetic Vortices  

NLE Websites -- All DOE Office Websites (Extended Search)

Reversing the Circulation of Magnetic Vortices Print Reversing the Circulation of Magnetic Vortices Print In magnetic media, information is stored in binary form-one or zero, depending on which way the electronic spins are aligned in a given section of the medium. Recently, however, magnetic vortices have drawn scientists toward a new possibility: multibit storage in which each logic unit has four states instead of two and can store twice the information. Each tiny magnetic whirl has a polarity that can point up or down and a circulation that can be oriented clockwise or counterclockwise. Previous studies have shown that the polarity can be flipped on command. Now, using time-resolved magnetic soft x-ray microscopy at the ALS, researchers have shown for the first time how to use pulsed magnetic fields to reverse the circulation.

5

Reversing the Circulation of Magnetic Vortices  

NLE Websites -- All DOE Office Websites (Extended Search)

Reversing the Circulation of Magnetic Vortices Print Reversing the Circulation of Magnetic Vortices Print In magnetic media, information is stored in binary form-one or zero, depending on which way the electronic spins are aligned in a given section of the medium. Recently, however, magnetic vortices have drawn scientists toward a new possibility: multibit storage in which each logic unit has four states instead of two and can store twice the information. Each tiny magnetic whirl has a polarity that can point up or down and a circulation that can be oriented clockwise or counterclockwise. Previous studies have shown that the polarity can be flipped on command. Now, using time-resolved magnetic soft x-ray microscopy at the ALS, researchers have shown for the first time how to use pulsed magnetic fields to reverse the circulation.

6

Reversing the Circulation of Magnetic Vortices  

NLE Websites -- All DOE Office Websites (Extended Search)

Reversing the Circulation of Reversing the Circulation of Magnetic Vortices Reversing the Circulation of Magnetic Vortices Print Wednesday, 31 July 2013 00:00 In magnetic media, information is stored in binary form-one or zero, depending on which way the electronic spins are aligned in a given section of the medium. Recently, however, magnetic vortices have drawn scientists toward a new possibility: multibit storage in which each logic unit has four states instead of two and can store twice the information. Each tiny magnetic whirl has a polarity that can point up or down and a circulation that can be oriented clockwise or counterclockwise. Previous studies have shown that the polarity can be flipped on command. Now, using time-resolved magnetic soft x-ray microscopy at the ALS, researchers have shown for the first time how to use pulsed magnetic fields to reverse the circulation.

7

Not All Nanodisk Magnetic Vortices Are Created Equally  

NLE Websites -- All DOE Office Websites (Extended Search)

Not All Nanodisk Magnetic Vortices Are Created Equally Print Not All Nanodisk Magnetic Vortices Are Created Equally Print Magnetic vortices - hurricanes of magnetism only a few atoms across - have generated intense interest in the high-tech community because of their potential application in nonvolatile random access memory (RAM) data storage systems. A team of researchers led by Peter Fischer and Mi-Young Im of the Center for X-Ray Optics (CXRO) worked in collaboration with scientists in Japan to discover that, contrary to what was previously believed, the formation of magnetic vortices in ferromagnetic nanodisks is an asymmetric phenomenon. This breaking of symmetry could lead to failure in a data storage device during its initialization process. These new findings indicate that the road to magnetic vortex RAM might be more difficult to navigate than previously supposed, but there might be unexpected rewards as well.

8

Not All Nanodisk Magnetic Vortices Are Created Equally  

NLE Websites -- All DOE Office Websites (Extended Search)

Not All Nanodisk Magnetic Vortices Are Created Equally Print Not All Nanodisk Magnetic Vortices Are Created Equally Print Magnetic vortices - hurricanes of magnetism only a few atoms across - have generated intense interest in the high-tech community because of their potential application in nonvolatile random access memory (RAM) data storage systems. A team of researchers led by Peter Fischer and Mi-Young Im of the Center for X-Ray Optics (CXRO) worked in collaboration with scientists in Japan to discover that, contrary to what was previously believed, the formation of magnetic vortices in ferromagnetic nanodisks is an asymmetric phenomenon. This breaking of symmetry could lead to failure in a data storage device during its initialization process. These new findings indicate that the road to magnetic vortex RAM might be more difficult to navigate than previously supposed, but there might be unexpected rewards as well.

9

Not All Nanodisk Magnetic Vortices Are Created Equally  

NLE Websites -- All DOE Office Websites (Extended Search)

Not All Nanodisk Magnetic Vortices Are Created Equally Print Not All Nanodisk Magnetic Vortices Are Created Equally Print Magnetic vortices - hurricanes of magnetism only a few atoms across - have generated intense interest in the high-tech community because of their potential application in nonvolatile random access memory (RAM) data storage systems. A team of researchers led by Peter Fischer and Mi-Young Im of the Center for X-Ray Optics (CXRO) worked in collaboration with scientists in Japan to discover that, contrary to what was previously believed, the formation of magnetic vortices in ferromagnetic nanodisks is an asymmetric phenomenon. This breaking of symmetry could lead to failure in a data storage device during its initialization process. These new findings indicate that the road to magnetic vortex RAM might be more difficult to navigate than previously supposed, but there might be unexpected rewards as well.

10

Not All Nanodisk Magnetic Vortices Are Created Equally  

NLE Websites -- All DOE Office Websites (Extended Search)

Not All Nanodisk Magnetic Vortices Are Created Equally Print Not All Nanodisk Magnetic Vortices Are Created Equally Print Magnetic vortices - hurricanes of magnetism only a few atoms across - have generated intense interest in the high-tech community because of their potential application in nonvolatile random access memory (RAM) data storage systems. A team of researchers led by Peter Fischer and Mi-Young Im of the Center for X-Ray Optics (CXRO) worked in collaboration with scientists in Japan to discover that, contrary to what was previously believed, the formation of magnetic vortices in ferromagnetic nanodisks is an asymmetric phenomenon. This breaking of symmetry could lead to failure in a data storage device during its initialization process. These new findings indicate that the road to magnetic vortex RAM might be more difficult to navigate than previously supposed, but there might be unexpected rewards as well.

11

Not All Nanodisk Magnetic Vortices Are Created Equally  

NLE Websites -- All DOE Office Websites (Extended Search)

Not All Nanodisk Magnetic Vortices Are Created Equally Print Not All Nanodisk Magnetic Vortices Are Created Equally Print Magnetic vortices - hurricanes of magnetism only a few atoms across - have generated intense interest in the high-tech community because of their potential application in nonvolatile random access memory (RAM) data storage systems. A team of researchers led by Peter Fischer and Mi-Young Im of the Center for X-Ray Optics (CXRO) worked in collaboration with scientists in Japan to discover that, contrary to what was previously believed, the formation of magnetic vortices in ferromagnetic nanodisks is an asymmetric phenomenon. This breaking of symmetry could lead to failure in a data storage device during its initialization process. These new findings indicate that the road to magnetic vortex RAM might be more difficult to navigate than previously supposed, but there might be unexpected rewards as well.

12

Not All Nanodisk Magnetic Vortices Are Created Equally  

NLE Websites -- All DOE Office Websites (Extended Search)

Not All Nanodisk Magnetic Vortices Are Created Equally Print Not All Nanodisk Magnetic Vortices Are Created Equally Print Magnetic vortices - hurricanes of magnetism only a few atoms across - have generated intense interest in the high-tech community because of their potential application in nonvolatile random access memory (RAM) data storage systems. A team of researchers led by Peter Fischer and Mi-Young Im of the Center for X-Ray Optics (CXRO) worked in collaboration with scientists in Japan to discover that, contrary to what was previously believed, the formation of magnetic vortices in ferromagnetic nanodisks is an asymmetric phenomenon. This breaking of symmetry could lead to failure in a data storage device during its initialization process. These new findings indicate that the road to magnetic vortex RAM might be more difficult to navigate than previously supposed, but there might be unexpected rewards as well.

13

Not All Nanodisk Magnetic Vortices Are Created Equally  

NLE Websites -- All DOE Office Websites (Extended Search)

Not All Nanodisk Magnetic Vortices Are Created Equally Print Not All Nanodisk Magnetic Vortices Are Created Equally Print Magnetic vortices - hurricanes of magnetism only a few atoms across - have generated intense interest in the high-tech community because of their potential application in nonvolatile random access memory (RAM) data storage systems. A team of researchers led by Peter Fischer and Mi-Young Im of the Center for X-Ray Optics (CXRO) worked in collaboration with scientists in Japan to discover that, contrary to what was previously believed, the formation of magnetic vortices in ferromagnetic nanodisks is an asymmetric phenomenon. This breaking of symmetry could lead to failure in a data storage device during its initialization process. These new findings indicate that the road to magnetic vortex RAM might be more difficult to navigate than previously supposed, but there might be unexpected rewards as well.

14

Manifestations of magnetic vortices in equation of state of Yang-Mills plasma  

E-Print Network (OSTI)

The vacuum of Yang-Mills theory contains singular stringlike objects identified with center (magnetic) vortices. Percolation of magnetic vortices is known to be responsible for the color confinement in the low-temperature phase of the theory. In our work we study properties of the vortices at finite temperature using lattice simulations of SU(2) gauge theory. We show that magnetic vortices provide a numerically large contribution to thermodynamic quantities of the gluon plasma in Yang-Mills theory. In particular, we observe that in the deconfinement phase at temperatures T_c energy-momentum tensor. In the confinement phase the vortex contribution is positive. The thermodynamical significance of the magnetic objects allows us to suggest that the quark-gluon plasma may contain a developed network of magnetic flux tubes. The existence of the vortex network may lead to observable effects in the quark-gluon plasma because the chromomagnetic field of the vortices should scatter and drag quarks.

M. N. Chernodub; Atsushi Nakamura; V. I. Zakharov

2008-07-31T23:59:59.000Z

15

Manifestations of magnetic vortices in equation of state of Yang-Mills plasma  

E-Print Network (OSTI)

The vacuum of Yang-Mills theory contains singular stringlike objects identified with center (magnetic) vortices. The percolation of the magnetic vortices is known to be responsible for the color confinement in the low-temperature phase of the theory. In our work we study properties of the vortices at finite temperature using lattice simulations of SU(2) gauge theory. We show that magnetic vortices provide numerically large contribution to thermodynamic quantities of gluon plasma in Yang-Mills theory. In particular, we observe that in the deconfinement phase at temperatures Tc energy-momentum tensor. In the confinement phase the vortex contribution is positive. The thermodynamical significance of the magnetic objects allows us to suggest that the quark gluon plasma may contain a developed network of the magnetic flux tubes. The existence of the vortex network may lead to observable eff...

Chernodub, M N; Zakharov, V I

2008-01-01T23:59:59.000Z

16

Polaron-like vortices, dissociation transition, and self-induced pinning in magnetic superconductors  

SciTech Connect

Vortices in magnetic superconductors polarize spins nonuniformly and repolarize them when moving. At a low spin relaxation rate and at low bias currents, vortices carrying magnetic polarization clouds become polaron-like and their velocities are determined by the effective drag coefficient that is significantly bigger than the Bardeen-Stephen (BS) one. As the current increases, vortices release polarization clouds and the velocity as well as the voltage in the I-V characteristics jump to values corresponding to the BS drag coefficient at a critical current J{sub c}. The nonuniform components of the magnetic field and magnetization drop as the velocity increases, resulting in weaker polarization and a discontinuous dynamic dissociation depinning transition. Experimentally, the jump shows up as a depinning transition and the corresponding current at the jump is the depinning current. As the current decreases, on the way back, vortices are retrapped by polarization clouds at the current J{sub r} < J{sub c}. As a result, the polaronic effect suppresses dissipation and enhances the critical current. Borocarbides (RE)Ni{sub 2}B{sub 2}C with a short penetration length and highly polarizable rare earth spins seem to be optimal systems for a detailed study of vortex polaron formation by measuring I-V characteristics. We also propose to use a superconductor-magnet multilayer structure to study polaronic mechanism of pinning with the goal to achieve high critical currents. The magnetic layers should have large magnetic susceptibility to enhance the coupling between vortices and magnetization in magnetic layers while the relaxation of the magnetization should be slow. For Nb and a proper magnet multilayer structure, we estimate the critical current density J{sub c} {approx} 10{sup 9} A/m{sup 2} at the magnetic field B Almost-Equal-To 1 T.

Bulaevskii, L. N., E-mail: lnb@lanl.gov; Lin, S.-Z. [Los Alamos National Laboratory, Theoretical Division (United States)] [Los Alamos National Laboratory, Theoretical Division (United States)

2013-09-15T23:59:59.000Z

17

Not All Nanodisk Magnetic Vortices Are Created Equally  

NLE Websites -- All DOE Office Websites (Extended Search)

T. Sato, S. Kasai, Y. Nakatani, and T. Ono, "Symmetry breaking in the formation of magnetic vortex states in a permalloy nanodisk," Nat. Comm. 3, 983 (2012). ALS Science...

18

Magnetic stabilization and vorticity in submillimeter paramagnetic liquid tubes  

Science Journals Connector (OSTI)

...this can be easily understood from the diagrams in Fig. 4. The field gradient...paramagnetic liquid is colored pink in the diagrams, and the water pale blue. The magnetization...2001 ) A minute magnetohydrodynamic (MHD) stirrer . Sensors Actuators B 79 : 207...

J. Michael D. Coey; Ryoichi Aogaki; Fiona Byrne; Plamen Stamenov

2009-01-01T23:59:59.000Z

19

Scanning Hall Probe Microscopy of Magnetic Vortices inVery Underdoped yttrium-barium-copper-oxide  

SciTech Connect

Since their discovery by Bednorz and Mueller (1986), high-temperature cuprate superconductors have been the subject of intense experimental research and theoretical work. Despite this large-scale effort, agreement on the mechanism of high-T{sub c} has not been reached. Many theories make their strongest predictions for underdoped superconductors with very low superfluid density n{sub s}/m*. For this dissertation I implemented a scanning Hall probe microscope and used it to study magnetic vortices in newly available single crystals of very underdoped YBa{sub 2}Cu{sub 3}O{sub 6+x} (Liang et al. 1998, 2002). These studies have disproved a promising theory of spin-charge separation, measured the apparent vortex size (an upper bound on the penetration depth {lambda}{sub ab}), and revealed an intriguing phenomenon of ''split'' vortices. Scanning Hall probe microscopy is a non-invasive and direct method for magnetic field imaging. It is one of the few techniques capable of submicron spatial resolution coupled with sub-{Phi}{sub 0} (flux quantum) sensitivity, and it operates over a wide temperature range. Chapter 2 introduces the variable temperature scanning microscope and discusses the scanning Hall probe set-up and scanner characterizations. Chapter 3 details my fabrication of submicron GaAs/AlGaAs Hall probes and discusses noise studies for a range of probe sizes, which suggest that sub-100 nm probes could be made without compromising flux sensitivity. The subsequent chapters detail scanning Hall probe (and SQUID) microscopy studies of very underdoped YBa{sub 2}Cu{sub 3}O{sub 6+x} crystals with T{sub c} {le} 15 K. Chapter 4 describes two experimental tests for visons, essential excitations of a spin-charge separation theory proposed by Senthil and Fisher (2000, 2001b). We searched for predicted hc/e vortices (Wynn et al. 2001) and a vortex memory effect (Bonn et al. 2001) with null results, placing upper bounds on the vison energy inconsistent with the theory. Chapter 5 discusses imaging of isolated vortices as a function of T{sub c}. Vortex images were fit with theoretical magnetic field profiles in order to extract the apparent vortex size. The data for the lowest T{sub c}'s (5 and 6.5 K) show some inhomogeneity and suggest that {lambda}{sub ab} might be larger than predicted by the T{sub c} {proportional_to} n{sub s}(0)/m* relation first suggested by results of Uemura et al. (1989) for underdoped cuprates. Finally, Chapter 6 examines observations of apparent ''partial vortices'' in the crystals. My studies of these features indicate that they are likely split pancake vortex stacks. Qualitatively, these split stacks reveal information about pinning and anisotropy in the samples. Collectively these magnetic imaging studies deepen our knowledge of cuprate superconductivity, especially in the important regime of low superfluid density.

Guikema, Janice Wynn; /SLAC, SSRL

2005-12-02T23:59:59.000Z

20

Magnetic vortices in a distributed Josephson junction with electrodes of finite thickness  

SciTech Connect

A distributed Josephson junction with electrodes of finite thickness is considered in the case of high critical current density when the Josephson penetration depth {lambda}{sub {ital j}} is less than the London depth {lambda}{sub {ital L}}. A nonlinear nonlocal equation for steady-state distributions of phase difference {ital cphi} across the junction is derived. In the asymptotical case of thin electrodes an exact nonlinear solution for this equation which corresponds to an isolated at-rest Josephson vortex is found. A numerical investigation of the equation derived is carried out and some static and dynamic characteristics of vortices in such a Josephson junction are represented.

Alfimov, G.L.; Popkov, A.F. [F. V. Lukin`s Research Institute of Physicsl Problems, Zelenograd, Moscow, 103460 (Russian Federation)] [F. V. Lukin`s Research Institute of Physicsl Problems, Zelenograd, Moscow, 103460 (Russian Federation)

1995-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "magnetic vortices print" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Vortices wiggled and dragged  

SciTech Connect

When a sufficiently strong magnetic field is applied to a superconductor, some of the field can pierce it through the generation of magnetic vortices, each of which contains a quantized amount of magnetic flux. Although the superconducting state of the material outside each vortex is maintained (and destroyed within each vortex), the interaction of vortices with a current passing through the material can cause them to move, dissipating energy and thereby generating a source of electrical resistance. The ability to manipulate an individual superconducting vortex represents a powerful tool for studying the dynamics of vortices and the superconductors that support them. It could also lead to the development of a new class of fluxon-based electronics.

Reichhardt, Charles [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

22

Embedded vortices  

Science Journals Connector (OSTI)

We present a discussion of embedded vortices in general Yang-Mills theories. The origin of a family structure of solutions is shown to be group theoretic in nature and a procedure for its determination is developed. Vortex stability can be quantified into three types: Abelian topological stability, non-Abelian topological stability, and dynamical stability; we relate these to the family structure of vortices, in particular discussing how Abelian topological and dynamical stability are related. The formalism also generally encompasses embedded domain walls and embedded monopoles also.

Nathan F. Lepora and Anne-Christine Davis

1998-11-23T23:59:59.000Z

23

Vortices in Brain waves  

E-Print Network (OSTI)

2003). Vortices in Brain Waves 62. M. E. Raichle, ScienceVORTICES IN BRAIN WAVES WALTER J. FREEMAN Department ofthat is recorded in brain waves (electroencephalogram, EEG).

Freeman, Walter J III; Vitiello, Giuseppe

2010-01-01T23:59:59.000Z

24

Controlled Manipulation of Individual Vortices in a Superconductor  

SciTech Connect

We report controlled local manipulation of single vortices by low temperature magnetic force microscope (MFM) in a thin film of superconducting Nb. We are able to position the vortices in arbitrary configurations and to measure the distribution of local depinning forces. This technique opens up new possibilities for the characterization and use of vortices in superconductors.

Straver, E.W.J.

2010-04-05T23:59:59.000Z

25

atlas superconducting magnet: Topics by E-print Network  

NLE Websites -- All DOE Office Websites (Extended Search)

Room temperature, water cooled copper magnets produceSuperconducting Magnet Division TEST RESULTS OF HTS COILS AND AN R&D MAGNET FOR RIA* R. Gupta, M. Anerella, M. Harrison,...

26

Instabilities of Non-Abelian Vortices in Dense QCD  

SciTech Connect

We construct a low-energy effective theory describing non-Abelian vortices in the color superconducting quark matter under stress. We demonstrate that all the vortices are radically unstable against decay into the only one type of vortices due to the potential term induced by the explicit flavor symmetry breaking by the strange quark mass. A simple analytical estimate for the lifetime of unstable vortices is provided under the controlled weak-coupling calculations. We briefly discuss the (non)existence of magnetic monopoles at high density.

Eto, Minoru [Theoretical Physics Laboratory, RIKEN, Saitama 351-0198 (Japan); Nitta, Muneto [Department of Physics, and Research and Education Center for Natural Sciences, Keio University, 4-1-1 Hiyoshi, Yokohama, Kanagawa 223-8521 (Japan); Yamamoto, Naoki [Department of Physics, University of Tokyo, Tokyo 113-0033 (Japan)

2010-04-23T23:59:59.000Z

27

Instabilities of Non-Abelian Vortices in Dense QCD  

E-Print Network (OSTI)

We construct a low-energy effective theory describing non-Abelian vortices in the color superconducting quark matter under stress. We demonstrate that all the vortices are radically unstable against decay into the only one type of vortices due to the potential term induced by the explicit flavor symmetry breaking by the strange quark mass. A simple analytical estimate for the lifetime of unstable vortices is provided under the controlled weak-coupling calculations. We briefly discuss the (non)existence of magnetic monopoles at high density.

Minoru Eto; Muneto Nitta; Naoki Yamamoto

2009-12-08T23:59:59.000Z

28

Fractional vortices and lumps  

SciTech Connect

We study what might be called fractional vortices, vortex configurations with the minimum winding from the viewpoint of their topological stability, but which are characterized by various notable substructures in the transverse energy distribution. The fractional vortices occur in diverse Abelian or non-Abelian generalizations of the Higgs model. The global and local features characterizing these are studied, and we identify the two crucial ingredients for their occurrence--the vacuum degeneracy leading to nontrivial vacuum moduli M, and the BPS nature of the vortices. Fractional vortices are further classified into two kinds. The first type of such vortices appear when M has orbifold Z{sub n} singularities; the second type occurs in systems in which the vacuum moduli space M possesses either a deformed geometry or some singularity. These general features are illustrated with several concrete models.

Eto, Minoru; Gudnason, Sven Bjarke; Konishi, Kenichi [Department of Physics, University of Pisa, Largo Pontecorvo, 3, Building C, 56127 Pisa (Italy); INFN, Sezione di Pisa, Largo Pontecorvo, 3, Ed. C, 56127 Pisa (Italy); Fujimori, Toshiaki; Nagashima, Takayuki [Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551 (Japan); Nitta, Muneto [Department of Physics, Keio University, Hiyoshi, Yokohama, Kanagawa 223-8521 (Japan); Ohashi, Keisuke [Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Cambridge, CB3 0WA (United Kingdom); Vinci, Walter [Department of Physics, University of Pisa, Largo Pontecorvo, 3, Building C, 56127 Pisa (Italy); INFN, Sezione di Pisa, Largo Pontecorvo, 3, Ed. C, 56127 Pisa (Italy); Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Cambridge, CB3 0WA (United Kingdom)

2009-08-15T23:59:59.000Z

29

Dynamic Switching of the Spin Circulation in Tapered Magnetic Nanodisks  

NLE Websites -- All DOE Office Websites (Extended Search)

Dynamic Switching of the Spin Dynamic Switching of the Spin Circulation in Tapered Magnetic Nanodisks Dynamic Switching of the Spin Circulation in Tapered Magnetic Nanodisks Print Monday, 22 April 2013 12:09 fischer-magnetic vortices Ferromagnetic NiFe disks (500-nm-wide and 20-nm-thick), were fabricated by e-beam lithography onto a waveguide structure. Field pulses, generated by launching current pulses into the waveguide trigger the magnetization dynamics in the elements. Using the soft x-ray microscope XM-1 providing 25-nm spatial resolution, circularly polarized soft x-rays give rise to XMCD contrast which allows to record an image of the in-plane circulation of the magnetic vortex. The topology of vortices-areas where there is a spinning motion around an imaginary axis-is a physical phenomenon which is found across a large

30

On the propagation of vorticity in multi-species plasmas  

SciTech Connect

The evolution of plasmas formed by several species is governed by one fluid equation for each species, all of them linked by an electromagnetic forcing and collisional terms, and the Maxwell equations. It is found that in the collisionless case, the field lines of a combination of fluid vorticity and magnetic field are transported by the flow as material points. In consequence, the vorticity propagates at the same velocity as the magnetic field. This is studied in depth for a number of simple configurations, showing that the vorticity travels at a certain fraction of the speed of light, depending on the size of the spatial mode.

Núñez, Manuel [Department of Algebra and Mathematical Analysis and IMUVA, Universidad de Valladolid, 47005 Valladolid (Spain)] [Department of Algebra and Mathematical Analysis and IMUVA, Universidad de Valladolid, 47005 Valladolid (Spain)

2013-12-15T23:59:59.000Z

31

J. Phys.: Condens. Matter 10 (1998) 71337144. Printed in the UK PII: S0953-8984(98)92644-3 X-ray diffraction, magnetization and nuclear magnetic  

E-Print Network (OSTI)

J. Phys.: Condens. Matter 10 (1998) 7133­7144. Printed in the UK PII: S0953-8984(98)92644-3 X-ray diffraction, magnetization and nuclear magnetic resonance study of Y2Fe17-xGax N X Shen, T K Daeubler , J I of the Holy Cross, Worcester, MA 01610, USA § State Key Laboratory of Magnetism, Institute of Physics, Chinese

Yang, De-Ping

32

arthritis magnetic resonance: Topics by E-print Network  

NLE Websites -- All DOE Office Websites (Extended Search)

during magnetic resonance imaging (MRI) is the distortion of the ECG due to electromagnetic interference cardiac activity that, unlike the ECG, is immune to electromagnetic...

33

Influence of Domain Wall Pinning on the Dynamic Behavior of Magnetic  

NLE Websites -- All DOE Office Websites (Extended Search)

Influence of Domain Wall Pinning on the Dynamic Behavior of Magnetic Vortices Print Influence of Domain Wall Pinning on the Dynamic Behavior of Magnetic Vortices Print Soft magnetic, micron-sized thin-film structures with magnetic vortices are intriguing systems that may one day be used in ultrafast computer memories. In such systems, the otherwise in-plane magnetization turns perpendicular to the plane at the center of the vortex, forming the vortex core. Because such a core has two possible polarizations (up or down) and can be switched between these two states by a small alternating magnetic field, it could serve as a memory bit in future magnetic memory devices. However, these magnetic structures often contain numerous imperfections such as domain wall pinning sites, which have to be taken into account for the practical application of such systems. To study how these defects affect the dynamics of magnetic vortices, researchers from Belgium, Germany, and the United States investigated square-shaped and disk-shaped thin-film structures with artificially introduced imperfections in the form of nanometer-sized holes. They used time-resolved scanning transmission x-ray microscopy (STXM) at ALS Beamline 11.0.2 to determine the frequency at which these vortices vibrate (their eigenfrequency). The imperfections were found to cause a higher vibrational frequency in square-shaped structures, but did not influence the disk-shaped structures. Knowledge of the frequency is crucial for vortex-based memories, since the electric signal for writing data needs to be precisely tuned to it.

34

Influence of Domain Wall Pinning on the Dynamic Behavior of Magnetic  

NLE Websites -- All DOE Office Websites (Extended Search)

Influence of Domain Wall Pinning on the Dynamic Behavior of Magnetic Vortices Print Influence of Domain Wall Pinning on the Dynamic Behavior of Magnetic Vortices Print Soft magnetic, micron-sized thin-film structures with magnetic vortices are intriguing systems that may one day be used in ultrafast computer memories. In such systems, the otherwise in-plane magnetization turns perpendicular to the plane at the center of the vortex, forming the vortex core. Because such a core has two possible polarizations (up or down) and can be switched between these two states by a small alternating magnetic field, it could serve as a memory bit in future magnetic memory devices. However, these magnetic structures often contain numerous imperfections such as domain wall pinning sites, which have to be taken into account for the practical application of such systems. To study how these defects affect the dynamics of magnetic vortices, researchers from Belgium, Germany, and the United States investigated square-shaped and disk-shaped thin-film structures with artificially introduced imperfections in the form of nanometer-sized holes. They used time-resolved scanning transmission x-ray microscopy (STXM) at ALS Beamline 11.0.2 to determine the frequency at which these vortices vibrate (their eigenfrequency). The imperfections were found to cause a higher vibrational frequency in square-shaped structures, but did not influence the disk-shaped structures. Knowledge of the frequency is crucial for vortex-based memories, since the electric signal for writing data needs to be precisely tuned to it.

35

Influence of Domain Wall Pinning on the Dynamic Behavior of Magnetic  

NLE Websites -- All DOE Office Websites (Extended Search)

Influence of Domain Wall Pinning on the Dynamic Behavior of Magnetic Vortices Print Influence of Domain Wall Pinning on the Dynamic Behavior of Magnetic Vortices Print Soft magnetic, micron-sized thin-film structures with magnetic vortices are intriguing systems that may one day be used in ultrafast computer memories. In such systems, the otherwise in-plane magnetization turns perpendicular to the plane at the center of the vortex, forming the vortex core. Because such a core has two possible polarizations (up or down) and can be switched between these two states by a small alternating magnetic field, it could serve as a memory bit in future magnetic memory devices. However, these magnetic structures often contain numerous imperfections such as domain wall pinning sites, which have to be taken into account for the practical application of such systems. To study how these defects affect the dynamics of magnetic vortices, researchers from Belgium, Germany, and the United States investigated square-shaped and disk-shaped thin-film structures with artificially introduced imperfections in the form of nanometer-sized holes. They used time-resolved scanning transmission x-ray microscopy (STXM) at ALS Beamline 11.0.2 to determine the frequency at which these vortices vibrate (their eigenfrequency). The imperfections were found to cause a higher vibrational frequency in square-shaped structures, but did not influence the disk-shaped structures. Knowledge of the frequency is crucial for vortex-based memories, since the electric signal for writing data needs to be precisely tuned to it.

36

Influence of Domain Wall Pinning on the Dynamic Behavior of Magnetic  

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Influence of Domain Wall Pinning on the Dynamic Behavior of Magnetic Vortices Print Influence of Domain Wall Pinning on the Dynamic Behavior of Magnetic Vortices Print Soft magnetic, micron-sized thin-film structures with magnetic vortices are intriguing systems that may one day be used in ultrafast computer memories. In such systems, the otherwise in-plane magnetization turns perpendicular to the plane at the center of the vortex, forming the vortex core. Because such a core has two possible polarizations (up or down) and can be switched between these two states by a small alternating magnetic field, it could serve as a memory bit in future magnetic memory devices. However, these magnetic structures often contain numerous imperfections such as domain wall pinning sites, which have to be taken into account for the practical application of such systems. To study how these defects affect the dynamics of magnetic vortices, researchers from Belgium, Germany, and the United States investigated square-shaped and disk-shaped thin-film structures with artificially introduced imperfections in the form of nanometer-sized holes. They used time-resolved scanning transmission x-ray microscopy (STXM) at ALS Beamline 11.0.2 to determine the frequency at which these vortices vibrate (their eigenfrequency). The imperfections were found to cause a higher vibrational frequency in square-shaped structures, but did not influence the disk-shaped structures. Knowledge of the frequency is crucial for vortex-based memories, since the electric signal for writing data needs to be precisely tuned to it.

37

alternating magnetic fields: Topics by E-print Network  

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attention on recent progresses. Massimo Giovannini 2006-12-14 32 Cosmological Magnetic Fields vs. CMB Astrophysics (arXiv) Summary: I present a short review of the effects of a...

38

Frequency dependence of the Chiral Vortical Effect  

E-Print Network (OSTI)

We study the frequency dependence of all the chiral vortical and magnetic conductivities for a relativistic gas of free chiral fermions and for a strongly coupled conformal field theory with holographic dual in four dimensions. Both systems have gauge and gravitational anomalies, and we compute their contribution to the conductivities. The chiral vortical conductivities and the chiral magnetic conductivity in the energy current show a frequency dependence in the form of a delta centered at zero frequency. This highly discontinuous behavior is a natural consequence of the Ward identities that include the energy momentum tensor. We discuss the physical interpretation of this result and its possible implications for the quark gluon plasma as created in heavy ion collisions. In the Appendix we discuss why the chiral magnetic effect seems to vanish in the consistent current for a particular implementation of the axial chemical potential.

Karl Landsteiner; Eugenio Megias; Francisco Peña Benítez

2014-09-18T23:59:59.000Z

39

Atomic Josephson vortices  

SciTech Connect

We show that Josephson vortices in a quasi-one-dimensional atomic Bose Josephson junction can be controllably manipulated by imposing a difference of chemical potentials on the atomic Bose-Einstein condensate waveguides forming the junction. This effect, which has its origin in the Berry phase structure of a vortex, turns out to be very robust in the whole range of the parameters where such vortices can exist. We also propose that a Josephson vortex can be created by the phase imprinting technique and can be identified by a specific tangential feature in the interference picture produced by expanding clouds released from the waveguides.

Kaurov, V. M.; Kuklov, A. B. [Department of Engineering Science and Physics, College of Staten Island, CUNY, Staten Island, New York 10314 (United States)

2006-01-15T23:59:59.000Z

40

Electrochemical biotin determination based on a screen printed carbon electrode array and magnetic beads  

Science Journals Connector (OSTI)

Abstract A biotin assay using magnetic beads (1 ?m) and a re-usable 8-chanel screen printed electrochemical array is here reported. The reaction scheme is based on a one step competitive assay between biotin and biotin labeled with horseradish peroxidase (B-HRP). The mixture of magnetic beads modified with streptavidin (Strep-MB), biotin and B-HRP is left 15 min under stirring and then a washing step is performed. After that, 20 ?L of the mixture is dropped twice on the electrodes and left 2 min. Then, the drop is removed and 20 ?L of 3,3?,5,5?-tetramethylbenzidine (TMB) is deposited on the electrode surface. After 20 min a potential of ?0.2 V is applied during 60 s, and 8 analytical signals are obtained. After washing with 0.1 M phosphate buffer the screen printed carbon electrode array can be use again. The linear range obtained is between 0.1 and 250 nM of biotin and have a sensitivity of 10?2 ?A nM?1.

Julien Biscay; María Begoña González García; Agustín Costa García

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "magnetic vortices print" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Whirlpools on the Nanoscale Could Multiply Magnetic Memory  

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Whirlpools on the Nanoscale Could Whirlpools on the Nanoscale Could Multiply Magnetic Memory Whirlpools on the Nanoscale Could Multiply Magnetic Memory Print Tuesday, 21 May 2013 00:00 Research at the Advanced Light Source may lead to four-bit magnetic cells housed on nanoscale metal disks, instead of the two-bit magnetic domains of standard magnetic memories. In magnetic vortices, parallel electron spins point either clockwise or counterclockwise, while in their crowded centers the spins point either down or up. "From the scientist's point of view, magnetism is about controlling electron spin," says Peter Fischer of the Materials Sciences Division, who leads the work at beamline 6.1.2. Four orientations could provide multibits in a new kind of memory. The next step is to control the states independently and simultaneously.

42

Electronic Structure and Magnetism in Diluted Magnetic Semiconductors  

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Electronic Structure and Magnetism in Diluted Magnetic Semiconductors Electronic Structure and Magnetism in Diluted Magnetic Semiconductors Print Wednesday, 29 November 2006 00:00...

43

Existence of Optical Vortices  

E-Print Network (OSTI)

Optical vortices arise as phase singularities of the light fields and are of central interest in modern optical physics. In this paper, some existence theorems are established for stationary vortex wave solutions of a general class of nonlinear Schr\\"{o}dinger equations. There are two types of results. The first type concerns the existence of positive-radial-profile solutions which are obtained through a constrained minimization approach. The second type addresses the existence of saddle-point solutions through a mountain-pass-theorem or min-max method so that the wave propagation constant may be arbitrarily prescribed in an open interval. Furthermore some explicit estimates for the lower bound and sign of the wave propagation constant with respect to the light beam power and vortex winding number are also derived for the first type solutions.

Yisong Yang; Ruifeng Zhang

2012-09-21T23:59:59.000Z

44

E-Print Network 3.0 - amino-functionalized magnetic nano-adsorbent...  

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How do we measure magnetic properties... ? What are the atomic reasons for magnetism? How are magnetic material classified? Materials design... for magnetic...

45

E-Print Network 3.0 - axially loaded magnetic Sample Search Results  

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magnetic Search Powered by Explorit Topic List Advanced Search Sample search results for: axially loaded magnetic Page: << < 1 2 3 4 5 > >> 1 Wireless Control of Magnetic Helical...

46

E-Print Network 3.0 - a-type stars magnetic Sample Search Results  

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Abstract Since the 12;rst detection of magnetic 12;elds on the Sun (Hale 1908) and stars (Babcock 1947... of magnetic 12;elds on stellar spectra), magnetic...

47

E-Print Network 3.0 - analyzing nuclear magnetic Sample Search...  

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nuclear magnetic Search Powered by Explorit Topic List Advanced Search Sample search results for: analyzing nuclear magnetic Page: << < 1 2 3 4 5 > >> 1 Nuclear Magnetic Resonance...

48

E-Print Network 3.0 - aligned magnetic field Sample Search Results  

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magnetic field Search Powered by Explorit Topic List Advanced Search Sample search results for: aligned magnetic field Page: << < 1 2 3 4 5 > >> 1 CHAPTER 20: MAGNETIC PROPERTIES...

49

J. Phys.: Condens. Matter 11 (1999) 833845. Printed in the UK PII: S0953-8984(99)96581-5 Structural and magnetic properties of ammonia-nitrided  

E-Print Network (OSTI)

J. Phys.: Condens. Matter 11 (1999) 833­845. Printed in the UK PII: S0953-8984(99)96581-5 Structural and magnetic properties of ammonia-nitrided Y2Fe17 N X Shen, J I Budnick, W A Hines, Y D Zhang, D of Connecticut, Storrs, CT 06269, USA Department of Physics, College of the Holy Cross, Worcester, MA 01610, USA

Yang, De-Ping

50

Non-Abelian Global Vortices  

E-Print Network (OSTI)

We study topologically stable non-Abelian global vortices in the U(N) linear sigma model. The profile functions of the solutions are numerically obtained. We investigate the behaviour of vortices in two limits in which masses of traceless or trace parts of massive bosons are much larger than the others. In the limit that the traceless parts are much heavier, we find a somewhat bizarre vortex solution carrying a non-integer U(1) winding number 1/\\sqrt{N} which is irrational in general.

Minoru Eto; Eiji Nakano; Muneto Nitta

2009-03-09T23:59:59.000Z

51

Graphene with Geometrically Induced Vorticity  

Science Journals Connector (OSTI)

At half filling, the electronic structure of graphene can be modeled by a pair of free two-dimensional Dirac fermions. We explicitly demonstrate that in the presence of a geometrically induced gauge field an everywhere-real Kekulé modulation of the hopping matrix elements can correspond to a nonreal Higgs field with nontrivial vorticity. This provides a natural setting for fractionally charged vortices with localized zero modes. For fullerenelike molecules we employ the index theorem to demonstrate the existence of six low-lying states that do not depend strongly on the Kekulé-induced mass gap.

Jiannis K. Pachos; Michael Stone; Kristan Temme

2008-04-18T23:59:59.000Z

52

Graphene with geometrically induced vorticity  

E-Print Network (OSTI)

At half filling, the electronic structure of graphene can be modelled by a pair of free two-dimensional Dirac fermions. We explicitly demonstrate that in the presence of a geometrically induced gauge field, an everywhere-real Kekule modulation of the hopping matrix elements can correspond to a non-real Higgs field with non-trivial vorticity. This provides a natural setting for fractionally charged vortices with localized zero modes. For fullerene-like molecules we employ the index theorem to demonstrate the existence of six low-lying states that do not depend strongly on the Kekule-induced mass gap.

Jiannis K. Pachos; Michael Stone; Kristan Temme

2007-10-03T23:59:59.000Z

53

Plasma vortices in the ionosphere and atmosphere  

Science Journals Connector (OSTI)

Vortices observed in ionized clouds of thunderstorm fronts have the nature of plasma vortices. In this work, the need to account for the electrostatic instability of plasma in the origination, intensification, an...

N. I. Izhovkina

2014-11-01T23:59:59.000Z

54

Potential Vorticity Anomalies Associated with Squall Lines  

Science Journals Connector (OSTI)

This study involves observations and model simulations of potential vorticity anomalies in the wake of midlatitude squall lines. Using data from the Oklahoma–Kansas PRE-STORM experiment, we analyze potential vorticity fields near two squall lines—...

Rolf F. A. Hertenstein; Wayne H. Schubert

1991-07-01T23:59:59.000Z

55

ALFVÉN WAVES IN SIMULATIONS OF SOLAR PHOTOSPHERIC VORTICES  

SciTech Connect

Using advanced numerical magneto-hydrodynamic simulations of the magnetized solar photosphere, including non-gray radiative transport and a non-ideal equation of state, we analyze plasma motions in photospheric magnetic vortices. We demonstrate that apparent vortex-like motions in photospheric magnetic field concentrations do not exhibit 'tornado'-like behavior or a 'bath-tub' effect. While at each time instance the velocity field lines in the upper layers of the solar photosphere show swirls, the test particles moving with the time-dependent velocity field do not demonstrate such structures. Instead, they move in a wave-like fashion with rapidly changing and oscillating velocity field, determined mainly by magnetic tension in the magnetized intergranular downflows. Using time-distance diagrams, we identify horizontal motions in the magnetic flux tubes as torsional Alfvén perturbations propagating along the nearly vertical magnetic field lines with local Alfvén speed.

Shelyag, S.; Cally, P. S. [Monash Centre for Astrophysics, School of Mathematical Sciences, Monash University, Victoria 3800 (Australia)] [Monash Centre for Astrophysics, School of Mathematical Sciences, Monash University, Victoria 3800 (Australia); Reid, A.; Mathioudakis, M. [Astrophysics Research Centre, School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN (United Kingdom)] [Astrophysics Research Centre, School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN (United Kingdom)

2013-10-10T23:59:59.000Z

56

Combustor with multistage internal vortices  

DOE Patents (OSTI)

A fluidized bed combustor is provided with a multistage arrangement of vortex generators in the freeboard area. The vortex generators are provided by nozzle means which extend into the interior of the freeboard for forming vortices within the freeboard area to enhance the combustion of particulate material entrained in product gases ascending into the freeboard from the fluidized bed. Each of the nozzles are radially inwardly spaced from the combustor walls defining the freeboard to provide for the formation of an essentially vortex-free, vertically extending annulus about the vortices whereby the particulate material centrifuged from the vortices against the inner walls of the combustor is returned through the annulus to the fluidized bed. By adjusting the vortex pattern within the freeboard, a significant portion of the full cross-sectional area of the freeboard except for the peripheral annulus can be contacted with the turbulent vortical flow for removing the particulate material from the gaseous products and also for enhancing the combustion thereof within the freeboard.

Shang, Jer Y. (4524 Andes Dr., Fairfax, VA 22030); Harrington, Richard E. (114 Beechwood St., Morgantown, WV 26505)

1989-01-01T23:59:59.000Z

57

Vortices and Other Topological Solitons in Dense Quark Matter  

E-Print Network (OSTI)

In this review, we discuss various properties of topological solitons in dense QCD matter, with a particular emphasis on the CFL phase exhibiting superfluidity and superconductivity, and their phenomenological implications in terms of the effective field theories such as the Ginzburg-Landau theory, the chiral Lagrangian, or the Bogoliubov--de Gennes equation. The most fundamental topological excitations are non-Abelian vortices, which are 1/3 quantized superfluid vortices and color magnetic flux tubes. They are created at a phase transition or a rotation such compact stars. The intervortex-interaction is repulsive and consequently a vortex lattice is formed. Bosonic and fermionic zero-energy modes are trapped in the vortex core and propagate along it as gapless excitations. The former consists of translational zero modes (a Kelvin mode) with a quadratic dispersion and CP(2) Nambu-Goldstone gapless modes with a linear dispersion, while the latter is the triplet Majorana fermion zero modes. The low-energy effective theory of the bosonic zero modes is a non-relativistic free complex scalar field and a CP(2) model in 1+1 dimensions. The effects of strange quark mass, electromagnetic interactions and non-perturbative quantum corrections are taken into account. Colorful boojums at the CFL interface, quantum color magnetic monopole confined by vortices, which supports the notion of quark-hadron duality, and Yang-Mills instantons inside a vortex as lumps are discussed. The interactions between a vortex and quasi-particles such as phonons, gluons, mesons, and photons are studied. A vortex lattice is shown to behave as a cosmic polarizer. Non-Abelian vortices are shown to behave as a novel kind of non-Abelian anyons. For the chiral symmetry breaking, we discuss fractional and integer axial domain walls, Abelian and non-Abelian axial vortices, axial wall-vortex composites, and Skyrmions.

Minoru Eto; Yuji Hirono; Muneto Nitta; Shigehiro Yasui

2013-08-07T23:59:59.000Z

58

Dynamics of Non-Abelian Vortices  

E-Print Network (OSTI)

The scattering is studied using moduli space metric for well-separated vortices of non-Abelian vortices in (2+1)-dimensional U(N) gauge theories with N Higgs fields in the fundamental representation. Unlike vortices in the Abelian-Higgs model, dynamics of non-Abelian vortices has a lot of new features; The kinetic energy in real space can be transfered to that of internal orientational moduli and vice versa, the energy and charge transfer between two vortices, the scattering angle of collisions with a fixed impact parameter depends on the internal orientations, and some resonances appear due to synchronization of the orientations. Scattering of dyonic non-Abelian vortices in a mass deformed theory is also studied. We find a bound state of two vortices moving along coils around a circle, like a loop of a phone code.

Minoru Eto; Toshiaki Fujimori; Muneto Nitta; Keisuke Ohashi; Norisuke Sakai

2011-05-08T23:59:59.000Z

59

E-Print Network 3.0 - astromag superconducting magnet Sample...  

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superconducting cuprates have the capability to pass very high currents in magnetic fields well above the highest... DC field in the world, the 45 tesla hybrid magnet (a ......

60

E-Print Network 3.0 - anomalous magnetic ordering Sample Search...  

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on phenomenological modeling of magnetic reconnection based on anomalous... of magnetic field lines for (a) uniform resistivity model (j ... Source: Yokoyama Takaaki - Department...

Note: This page contains sample records for the topic "magnetic vortices print" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

E-Print Network 3.0 - arbitrary magnetic field Sample Search...  

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magnetic field Search Powered by Explorit Topic List Advanced Search Sample search results for: arbitrary magnetic field Page: << < 1 2 3 4 5 > >> 1 Progress In Electromagnetics...

62

E-Print Network 3.0 - axisymmetric magnetic field Sample Search...  

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magnetic field Search Powered by Explorit Topic List Advanced Search Sample search results for: axisymmetric magnetic field Page: << < 1 2 3 4 5 > >> 1 Magnetohydrodynamics in...

63

E-Print Network 3.0 - alternative magnetic fields Sample Search...  

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the interface between two immiscible liquids and energized by an alternating magnetic field. Depending... on the frequency and amplitude of magnetic field, a variety of dynamic...

64

E-Print Network 3.0 - applied homogeneous magnetic Sample Search...  

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Karsten - Physikalisches Institut, Universitt Bonn Collection: Physics ; Materials Science 6 Magnetic anisotropy in Fe-25Cr-12Co-1Si alloy induced by external magnetic field...

65

E-Print Network 3.0 - anomalous magnetic behavior Sample Search...  

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of Physics, University of Maryland at College Park Collection: Engineering ; Materials Science 3 Probing the magnetic microstructure of an amorphous GdFe system with magnetic...

66

E-Print Network 3.0 - artificial molecular magnets Sample Search...  

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ligands. The calculations show that the inherent spin magnetic... for new nanoscale magnetic materials. Single molecular ... Source: Kern, Klaus - Nanoscale Science...

67

E-Print Network 3.0 - ac applied magnetic Sample Search Results  

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- Superconducting Magnet Division, Brookhaven National Laboratory Collection: Physics 97 TEST RESULTS OF HTS COILS AND AN R&D MAGNET FOR RIA* , M. Anerella, M. Harrison, J....

68

E-Print Network 3.0 - avian magnetic compass Sample Search Results  

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Liechti Summary: illustrating the functional mode of the avian magnetic compass as an inclination compass: He vector... of the avian magnetic compass. The bird symbol indicates...

69

Moduli Space of Non-Abelian Vortices  

E-Print Network (OSTI)

We completely determine the moduli space M_{N,k} of k-vortices in U(N) gauge theory with N Higgs fields in the fundamental representation. Its open subset for separated vortices is found as the symmetric product (C x CP^{N-1})^k / S_k. Orbifold singularities of this space correspond to coincident vortices and are resolved resulting in a smooth moduli manifold. Relation to Kahler quotient construction is discussed.

Minoru Eto; Youichi Isozumi; Muneto Nitta; Keisuke Ohashi; Norisuke Sakai

2005-11-08T23:59:59.000Z

70

Moduli Space of Non-Abelian Vortices  

SciTech Connect

We completely determine the moduli space M{sub N,k} of k vortices in U(N) gauge theory with N Higgs fields in the fundamental representation. Its open subset for separated vortices is found as the symmetric product (CxCP{sup N-1}){sup k}/S{sub k}. Orbifold singularities of this space correspond to coincident vortices and are resolved resulting in a smooth moduli manifold. The relation to Kaehler quotient construction is discussed.

Eto, Minoru; Isozumi, Youichi; Nitta, Muneto; Ohashi, Keisuke; Sakai, Norisuke [Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551 (Japan)

2006-04-28T23:59:59.000Z

71

Taylor Vortices in Wide Spherical Shells  

Science Journals Connector (OSTI)

It was believed that no Taylor vortices would exist in wide spherical shells with an aspect ratio of ?>0.24. In contrast, we have experimentally generated Taylor vortices in a relatively wide spherical shell with ?=0.33 using some special initial conditions. It is found that the Taylor vortices remain very stable in a range of the Reynolds number 467vortices become asymmetric with respect to the equatorial plane.

M. Liu, C. Blohm, C. Egbers, P. Wulf, and H. J. Rath

1996-07-08T23:59:59.000Z

72

Coherence vortices in one spatial dimension  

SciTech Connect

Coherence vortices are screw-type topological defects in the phase of Glauber's two-point degree of quantum coherence, associated with pairs of spatial points at which an ensemble-averaged stochastic quantum field is uncorrelated. Coherence vortices may be present in systems whose dimensionality is too low to support spatial vortices. We exhibit lattices of such quantum-coherence phase defects for a one-dimensional model quantum system. We discuss the physical meaning of coherence vortices and propose how they may be realized experimentally.

Simula, Tapio P.; Paganin, David M. [School of Physics, Monash University, Victoria 3800 (Australia)

2011-11-15T23:59:59.000Z

73

E-Print Network 3.0 - anisotropic magnetic properties Sample...  

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anisotropic garnets lo. But the (YTb)IG properties at H > 20 T are typ- ical of the Ising magnets... behaviour is typical for the strongly anisotropic (Ising) magnets 7....

74

E-Print Network 3.0 - asymmetric two-dimensional magnetic Sample...  

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of asymmetric magnetic field reconnection Summary: of the Figure 2. Magnetic field lines in a two-dimensional plane for asymmetric reconnection. A00C03 MOZER ET AL......

75

E-Print Network 3.0 - asymptotically large magnetic Sample Search...  

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asymptotically large magnetic Page: << < 1 2 3 4 5 > >> 1 Dynamics of chaotic magnetic lines and noble ITB's in the Tokamap J. H. Misguich and Fusion BFR Working Group (*)...

76

E-Print Network 3.0 - accreting magnetic white Sample Search...  

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magnetic white Search Powered by Explorit Topic List Advanced Search Sample search results for: accreting magnetic white Page: << < 1 2 3 4 5 > >> 1 Mon. Not. R. Astron. Soc. 000,...

77

E-Print Network 3.0 - aspect ratio micro-electro-magnetic-mechanical...  

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micro-electro-magnetic-mechanical Search Powered by Explorit Topic List Advanced Search Sample search results for: aspect ratio micro-electro-magnetic-mechanical Page: << < 1 2 3 4...

78

E-Print Network 3.0 - assisted magnetic recording Sample Search...  

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Systems and Measurements, A. M. Taratorin Digital Baseband... Recording Process, Magnetic Replay Process, ... Source: Kovintavewat, Piya - Faculty of Science and...

79

E-Print Network 3.0 - amorphous soft magnetic Sample Search Results  

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of Materials Science and Engineering, Carnegie Mellon University Collection: Materials Science 5 Magnetic Nanocomposite Materials for High Temperature Applications Frank...

80

E-Print Network 3.0 - antiferromagnet magnetic excitations Sample...  

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anisotropic uniaxial antiferromagnet with a magnetic phase... . The transition to the Ising-like antiferromagnetic phase is possible ... Source: Ecole Polytechnique, Centre de...

Note: This page contains sample records for the topic "magnetic vortices print" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

E-Print Network 3.0 - acoustic nuclear magnetic resonance Sample...  

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Biochemistry, Florida State University Collection: Chemistry 57 Calculation Method of Permanent Magnet Pickups for Electric Guitars Summary: from two points of view that have to be...

82

E-Print Network 3.0 - angle lipomas magnetic Sample Search Results  

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Biology and Medicine ; Engineering 4 JBO Letters Revealing retroperitoneal Summary: - phy, and magnetic resonance imaging are used to pre-operatively detect and evaluate the LS...

83

E-Print Network 3.0 - ankle magnetic resonance Sample Search...  

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Search Powered by Explorit Topic List Advanced Search Sample search results for: ankle magnetic resonance Page: << < 1 2 3 4 5 > >> 1 Evaluation of Methods That Locate the...

84

E-Print Network 3.0 - alternating magnetic properties Sample...  

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56 nature materials | VOL 6 | JANUARY 2007 | www.nature.comnaturematerials 13 REVIEW ARTICLE Summary: -sought control of electric properties by magnetic fields was...

85

E-Print Network 3.0 - astrid-2 emma magnetic Sample Search Results  

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(2001) 19: 611619 c European Geophysical Society 2001 Geophysicae Summary: of magnetic field lines as calculated from the Tsyganenko96 model and the field line passing though...

86

E-Print Network 3.0 - axial magnetic bearing Sample Search Results  

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- Department of Physics, University of Central Florida Collection: Physics ; Materials Science 3 Magnetic Pressure and Shape of Ferrofluid Seals in Cylindrical Structures...

87

E-Print Network 3.0 - analyze magnetic flux Sample Search Results  

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of ... Source: Wang, Jingxiu - National Astronomical Observatories of Chinese Academy of Science Collection: Physics 9 Magnetic flux distribution in a three-dimensional inductive...

88

E-Print Network 3.0 - ac magnetic susceptibility Sample Search...  

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Spinu, Leonard - Department of Physics, University of New Orleans Collection: Materials Science ; Engineering 2 Fig. 1. Scanning electron micrograph of magnetic spherules...

89

E-Print Network 3.0 - annual magnet technology Sample Search...  

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& A is designed to separate magnet science and technology fact from fiction. If you have topics... . The application of this knowledge has led to such technological innovations as...

90

E-Print Network 3.0 - arch magnetic resonance Sample Search Results  

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The resonator having central frequency f0 5 GHz... are the development of magnetically tunable YIG band-pass ... Source: Srinivasan, Gopalan - Department of Physics, Oakland...

91

E-Print Network 3.0 - alzheimer-type magnetic resonance Sample...  

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The resonator having central frequency f0 5 GHz... are the development of magnetically tunable YIG band-pass ... Source: Srinivasan, Gopalan - Department of Physics, Oakland...

92

E-Print Network 3.0 - acid-dcys-ser-lys-cys magnetic resonance...  

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The resonator having central frequency f0 5 GHz... are the development of magnetically tunable YIG band-pass ... Source: Srinivasan, Gopalan - Department of Physics, Oakland...

93

E-Print Network 3.0 - authentic magnetic resonance Sample Search...  

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The resonator having central frequency f0 5 GHz... are the development of magnetically tunable YIG band-pass ... Source: Srinivasan, Gopalan - Department of Physics, Oakland...

94

E-Print Network 3.0 - alternative magnetic resonance Sample Search...  

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field provides a tool for tuning the dielectric resonance... resonator a magnetic field tunable dielectric resonances at frequencies much higher than usual ferromagnetic... , on...

95

E-Print Network 3.0 - activatable magnetic resonance Sample Search...  

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The resonator having central frequency f0 5 GHz... are the development of magnetically tunable YIG band-pass ... Source: Srinivasan, Gopalan - Department of Physics, Oakland...

96

E-Print Network 3.0 - average magnetic well Sample Search Results  

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... Source: Ecole Polytechnique, Centre de mathmatiques Collection: Mathematics 90 TEST RESULTS OF HTS COILS AND AN R&D MAGNET FOR RIA* , M. Anerella, M. Harrison, J....

97

E-Print Network 3.0 - accelerator magnet program Sample Search...  

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Physics, Detector KEDR Experiments Collection: Fission and Nuclear Technologies 29 TEST RESULTS OF HTS COILS AND AN R&D MAGNET FOR RIA* , M. Anerella, M. Harrison, J....

98

E-Print Network 3.0 - ac magnetization measurements Sample Search...  

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Engineering Department, Sungkyunkwan University Collection: Materials Science 79 TEST RESULTS OF HTS COILS AND AN R&D MAGNET FOR RIA* , M. Anerella, M. Harrison, J....

99

E-Print Network 3.0 - acceleration magnetic field Sample Search...  

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of Electronic Engineering, Tohoku University Collection: Physics ; Materials Science 86 TEST RESULTS OF HTS COILS AND AN R&D MAGNET FOR RIA* , M. Anerella, M. Harrison, J....

100

E-Print Network 3.0 - aps magnet support Sample Search Results  

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Effect in MSMAs Bjorn Kiefera and Dimitris C. Lagoudasa a Department of Aerospace... ABSTRACT This work is concerned with the magnetic field-induced rearrangement of...

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While these samples are representative of the content of NLEBeta,
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101

E-Print Network 3.0 - abdominal magnetic resonance Sample Search...  

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between men and women at rest and during lower Summary: resonance-compatible exercise bicycle, magnetic resonance imaging techniques, and custom data processing... at all. We have...

102

E-Print Network 3.0 - active magnetic regenerator Sample Search...  

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1D model of an active magnetic regenerative refrigerator (AMRR) that was developed in MATLAB. The model uses cycle inputs such as the fluid mass flow and Summary: of an Active...

103

E-Print Network 3.0 - active magnetic regeneration Sample Search...  

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1D model of an active magnetic regenerative refrigerator (AMRR) that was developed in MATLAB. The model uses cycle inputs such as the fluid mass flow and Summary: of an Active...

104

E-Print Network 3.0 - atlas solenoid magnetic Sample Search Results  

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Page: << < 1 2 3 4 5 > >> 1 MERIT Installation Status K. McDonald Summary: , transfer lines, racks, beam magnets. Solenoid mated with Hg system, both tilted by 67 mrad &...

105

E-Print Network 3.0 - ambient magnetic field Sample Search Results  

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by Explorit Topic List Advanced Search Sample search results for: ambient magnetic field Page: << < 1 2 3 4 5 > >> 1 The Astrophysical Journal, 623:L89L92, 2005 April 20 2005....

106

E-Print Network 3.0 - angle-dependent magnetic quantum Sample...  

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Mary C. Gurak12 Summary: Deg, h a2 Temperature Dependence of the EPR in max magnetic field Angle Dependence of the modified... . By analyzing the temperature and angle...

107

E-Print Network 3.0 - acceptable residual magnetic Sample Search...  

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in the shaking coils was set to 35 mA at 200 Hz. Profiles of the residual magnetic field measured along... shielding factor of only 8. Figure 3 shows results of compensating...

108

E-Print Network 3.0 - atlas magnet common Sample Search Results  

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Line DVB Valve Box Transfer Lines to Magnet N2... litre dewar currently used at ATLAS hall 180 test facility. Principly similar type could be used Source: McDonald, Kirk...

109

E-Print Network 3.0 - advanced magnetic materials Sample Search...  

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B. ParkerJ. Cozzolino S. Peggs... W. Louie E. WillenJ. Muratore 12;Construction and Test of the Magnetic Mirror Model of the HTS RIA Source: Gupta, Ramesh - Superconducting...

110

E-Print Network 3.0 - arc dipole magnets Sample Search Results  

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that keeps decay particles in a neutrino factory... coil bend radius allows "react and wind" magnet technology to be used for brittle Nb3Sn superconductors Source: Gupta, Ramesh...

111

Magnetic Vortex Core Reversal by Low-Field Excitations  

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Magnetic Vortex Core Reversal by Low-Field Excitations Print In micrometer-sized magnetic thin films, the magnetization typically adopts an in-plane, circular configuration known...

112

On the interaction of mesoscopic magnetic textures with superconductors  

E-Print Network (OSTI)

, and established the required conditions for that. In particular, we studied two configurations for the magnetization distribution, namely the magnetic vortex and magnetic dot. We found that the dot was capable of simultaneously creating vortices...

Kayali, Mohammad Amin

2012-06-07T23:59:59.000Z

113

Vortices and Other Topological Solitons in Dense Quark Matter  

E-Print Network (OSTI)

In this review, we discuss various properties of topological solitons in dense QCD matter, with a particular emphasis on the CFL phase exhibiting superfluidity and superconductivity, and their phenomenological implications in terms of the effective field theories such as the Ginzburg-Landau theory, the chiral Lagrangian, or the Bogoliubov--de Gennes equation. The most fundamental topological excitations are non-Abelian vortices, which are 1/3 quantized superfluid vortices and color magnetic flux tubes. They are created at a phase transition or a rotation such compact stars. The intervortex-interaction is repulsive and consequently a vortex lattice is formed. Bosonic and fermionic zero-energy modes are trapped in the vortex core and propagate along it as gapless excitations. The former consists of translational zero modes (a Kelvin mode) with a quadratic dispersion and CP(2) Nambu-Goldstone gapless modes with a linear dispersion, while the latter is the triplet Majorana fermion zero modes. The low-energy effec...

Eto, Minoru; Nitta, Muneto; Yasui, Shigehiro

2013-01-01T23:59:59.000Z

114

Monopoles and Vortices in the SU(2) Positive Plaquette Model  

E-Print Network (OSTI)

We study the heavy quark potential in the SU(2) positive plaquette model using monopoles in the maximum abelian gauge, and vortices. Monopoles give a quantitative description of the string tension. Vortices approximately reproduce the entire heavy quark potential.

John D. Stack; William Tucker

1998-10-04T23:59:59.000Z

115

CSU ATS710 Fall 2011 GEOPHYSICAL VORTICES  

E-Print Network (OSTI)

, Willoughby et al. 1982) 1.4 The role of inertial stability in hurricane intensification (Schubert and Hack (Schubert and Hack 1983) 1.6 Nonlinear response of atmospheric vortices to heating by organized cumulus convection (Hack and Schu- bert 1986) 1.7 Extensions and applications of Ooyama's model (Sundqvist 1970

116

Abrikosov vortices in long Josephson junctions  

Science Journals Connector (OSTI)

We have developed a theory of the critical current Ic of a long Josephson junction in the presence of a finite density of Abrikosov vortices trapped in the electrodes in the immediate vicinity of the plane of the junction. We show that under these conditions the Josephson phase difference can be finite even well inside the junction in such a way as to result in a nonmonotonous dependence of Ic on the concentration of the perturbing vortices, a behavior at variance with that of a short junction. As the average distance between the vortices decreases, Ic reaches a maximum. The location, magnitude, and sharpness of this feature are strongly dependent on the ratio ??J/r0, where r0 and ? are respectively the range and the strength of the effective interaction between the Abrikosov vortices and the Josephson fluxons while ?J is the Josephson penetration length. The results obtained are used to discuss the behavior of the critical current recently observed in Josephson junctions based on Nb films.

Mikhail V. Fistul and Gabriele F. Giuliani

1998-10-01T23:59:59.000Z

117

Electron vortices in semiconductors devicesa... Kamran Mohsenib  

E-Print Network (OSTI)

stretching term in the vorticity equation. This term could be responsible for the possible cascade transport in two-dimensional electron gas 2DEG exists in three regimes: ballistic, quasi extensive research to include quantum mechanical effects1,2 where the wave nature of electrons plays

118

2, 34993531, 2014 vorticity-driven  

E-Print Network (OSTI)

if available. Resolving vorticity-driven lateral fire spread using the WRF-Fire coupled atmosphere across a steep lee-facing slope in a direction transverse to the back- ground winds, and is often using the WRF-Fire coupled5 atmosphere-fire model has demonstrated that fire channelling can

Evans, Jason

119

Magnetism  

Science Journals Connector (OSTI)

Historically, magnetism is related to rock magnetism, due to a few minerals exhibiting spontaneous magnetization. Attractive properties of magnetite were already known in Antiquity and were used for navigation...

Guillaume Morin

1998-01-01T23:59:59.000Z

120

magnetism  

Science Journals Connector (OSTI)

magnetism [A class of physical phenomena associated with moving electricity, including the mutual mechanical forces among magnets and electric currents] ? Magnetismus m

2014-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "magnetic vortices print" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Whirlpools on the Nanoscale Could Multiply Magnetic Memory  

NLE Websites -- All DOE Office Websites (Extended Search)

Whirlpools on the Nanoscale Could Multiply Magnetic Memory Whirlpools on the Nanoscale Could Multiply Magnetic Memory Print Tuesday, 21 May 2013 00:00 Research at the Advanced...

122

Printed Circuits  

Science Journals Connector (OSTI)

... a leading contributor to the technology of printed circuits, and the inventor of the printed foil technique now in general use.

J. C. CLULEY

1959-05-30T23:59:59.000Z

123

Group Theory of Non-Abelian Vortices  

E-Print Network (OSTI)

We investigate the structure of the moduli space of multiple BPS non-Abelian vortices in U(N) gauge theory with N fundamental Higgs fields, focusing our attention on the action of the exact global (color-flavor diagonal) SU(N) symmetry on it. The moduli space of a single non-Abelian vortex, CP(N-1), is spanned by a vector in the fundamental representation of the global SU(N) symmetry. The moduli space of winding-number k vortices is instead spanned by vectors in the direct-product representation: they decompose into the sum of irreducible representations each of which is associated with a Young tableau made of k boxes, in a way somewhat similar to the standard group composition rule of SU(N) multiplets. The K\\"ahler potential is exactly determined in each moduli subspace, corresponding to an irreducible SU(N) orbit of the highest-weight configuration.

Minoru Eto; Toshiaki Fujimori; Sven Bjarke Gudnason; Yunguo Jiang; Kenichi Konishi; Muneto Nitta; Keisuke Ohashi

2010-09-24T23:59:59.000Z

124

Charged Vortices in High Temperature Superconductors  

Science Journals Connector (OSTI)

It is argued that in the mixed state of a type II superconductor, because of the difference of the chemical potential in a superconducting versus normal state, the vortex cores may become charged. The extra electron density is estimated. The extra charge contributes to the dynamics of the vortices; in particular, it can explain in certain cases the change of the sign of the Hall coefficient below Tc frequently observed in the high temperature superconductors.

D. I. Khomskii and A. Freimuth

1995-08-14T23:59:59.000Z

125

E-Print Network 3.0 - alloy magnets co-sm-cu-fe-zr Sample Search...  

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properties of Fe-25Cr-12Co-1Si alloy thermo-magnetically treated under different external magnetic field... Si alloy ... Source: Qin, Lu-Chang - Department of Physics and...

126

Magnetism  

Science Journals Connector (OSTI)

... dipoles in applied fields". It deals with the classical (Langevin) theory of para-magnetism, anisotropy fields and magnetic measurements. In the next chapter "Atomic structure" the author ... special relevance to ferrites and the inclusion of a quite lengthy discussion of Pauli para-magnetism and of Stoner's treatment of itinerant electron ferromagnetism, though it does much to ...

E. W. LEE

1972-03-31T23:59:59.000Z

127

Non-Abelian vortices on a cylinder: Duality between vortices and walls  

SciTech Connect

We investigate vortices on a cylinder in supersymmetric non-Abelian gauge theory with hypermultiplets in the fundamental representation. We identify moduli space of periodic vortices and find that a pair of wall-like objects appears as the vortex moduli is varied. Usual domain walls also can be obtained from the single vortex on the cylinder by introducing a twisted boundary condition. We can understand these phenomena as a T duality among D-brane configurations in type II superstring theories. Using this T-duality picture, we find a one-to-one correspondence between the moduli space of non-Abelian vortices and that of kinky D-brane configurations for domain walls.

Eto, Minoru; Fujimori, Toshiaki; Isozumi, Youichi; Nitta, Muneto; Ohashi, Keisuke; Sakai, Norisuke [Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551 (Japan); Ohta, Kazutoshi [Theoretical Physics Laboratory, The Institute of Physical and Chemical Research (RIKEN), Wako 351-0198 (Japan)

2006-04-15T23:59:59.000Z

128

Coherence vortices in Mie scattered nonparaxial partially coherent beams  

Science Journals Connector (OSTI)

We have previously demonstrated that Mie scattering of partially coherent plane waves can create coherence vortices, namely screw-type dislocations in the phase of the spectral degree...

Marasinghe, Madara L; Premaratne, Malin; Paganin, David M; Alonso, Miguel A

2012-01-01T23:59:59.000Z

129

Spontaneous vortices in ferromagnet-superconductor systems  

E-Print Network (OSTI)

and located at the planes zn = nd (n is an integer). The vector po- tential Av due to the pancake vortex at superconducting layers satis?es a following equation: ??Av(?;z) + 1currency1 X n ?(z ?zn)Av(?;z) = ?02?currency1 X n ?(z ?zn) X np ?npr(2)'n(? ??np...) : (2.34) The vector potential in Eq. (2.34) is induced by pancake vortex with the vortic- ity ?np = ?1 placed at the position ?np, where p enumerates vortex in the n-th plane. The Coulomb gauge r ? Av = 0 is used. In addition, Avz = 0 because...

Wei, Hongduo

2006-08-16T23:59:59.000Z

130

Fundamentals of Magnetic Recording  

Science Journals Connector (OSTI)

In recent years magnetic recording has become a preferred medium for storing information such as printed language, mathematics, sound, and pictures. It is compact, economical, easily updated, and instantly ret...

Marvin Camras

1988-01-01T23:59:59.000Z

131

Magnetism  

Science Journals Connector (OSTI)

... THIS is a good book, and we are glad to see the subject of magnetism fully treated in a popularly written text-book. It is a second edition of ... of importance, accuracy, and exhaustiveness, places the present treatise, as far as terrestrial magnetism is concerned, much before any similar book with which we are acquainted. The correction ...

JAMES STUART

1872-03-07T23:59:59.000Z

132

Domain Walls and Vortices in Chiral Symmetry Breaking  

E-Print Network (OSTI)

We study domain walls and vortices in chiral symmetry breaking in a QCD-like theory with N flavors in the chiral limit. If the axial anomaly is absent, there exist stable Abelian axial vortices winding around the spontaneously broken U(1)_A symmetry and non-Abelian axial vortices winding around both the U(1)_A and non-Abelian SU(N) chiral symmetries. In the presence of the axial anomaly term, metastable domain walls are present and Abelian axial vortices must be attached by N domain walls, forming domain wall junctions. We show that a domain wall junction decays into N non-Abelian vortices attached by domain walls, implying its metastability. We also show that domain walls decay through the quantum tunneling by creating a hole bounded by a closed non-Abelian vortex.

Minoru Eto; Yuji Hirono; Muneto Nitta

2013-09-18T23:59:59.000Z

133

Effective Theory on Non-Abelian Vortices in Six Dimensions  

E-Print Network (OSTI)

Non-Abelian vortices in six spacetime dimensions are obtained for a supersymmetric U(N) gauge theory with N hypermultiplets in the fundamental representation. Massless (moduli) fields are identified and classified into Nambu-Goldstone and quasi-Nambu-Goldstone fields. Effective gauge theories for the moduli fields are constructed on the four-dimensional world volume of vortices. A systematic method to obtain the most general form of the effective Lagrangian consistent with symmetry is proposed. The moduli space for the multi-vortices is found to be a vector bundle over the complex Grassmann manifold.

Minoru Eto; Muneto Nitta; Norisuke Sakai

2004-05-19T23:59:59.000Z

134

Kinetic study of ion-acoustic plasma vortices  

SciTech Connect

The kinetic theory of electron plasma waves with finite orbital angular momentum has recently been introduced by Mendonca. This model shows possibility of new kind of plasma waves and instabilities. We have extended the theory to ion-acoustic plasma vortices carrying orbital angular momentum. The dispersion equation is derived under paraxial approximation which exhibits a kind of linear vortices and their Landau damping. The numerical solutions are obtained and compared with analytical results which are in good agreement. The physical interpretation of the ion-acoustic plasma vortices and their Landau resonance conditions are given for typical case of Maxwellian plasmas.

Khan, S. A. [National Centre for Physics (NCP), Quaid-i-Azam University Campus, Islamabad 45320 (Pakistan); Aman-ur-Rehman, E-mail: amansadiq@gmail.com [Pakistan Institute of Engineering and Applied Sciences (PIEAS), P.O. Nilore, Islamabad 45650 (Pakistan); Mendonca, J. T. [IPFN, Instituto Superior Téchnico, Av. Rovisco Pais 1, 1049-001 Lisboa (Portugal)

2014-09-15T23:59:59.000Z

135

Dynamics of Absolute Vorticity in the Boussinesq Fluid  

Science Journals Connector (OSTI)

The dynamics of absolute vorticity in the Boussinesq fluid is examined. It is shown that the Boussinesq approximation only captures one of the horizontal ... component of the solenoidal term neglected by the Boussinesq

Zuohao Cao

1999-01-01T23:59:59.000Z

136

Non-Abelian Vortices of Higher Winding Numbers  

E-Print Network (OSTI)

We make a detailed study of the moduli space of winding number two (k=2) axially symmetric vortices (or equivalently, of co-axial composite of two fundamental vortices), occurring in U(2) gauge theory with two flavors in the Higgs phase, recently discussed by Hashimoto-Tong (hep-th/0506022) and Auzzi-Shifman-Yung (hep-th/0511150). We find that it is a weighted projective space WCP^2_(2,1,1)=CP^2/Z_2. This manifold contains an A_1-type (Z_2) orbifold singularity even though the full moduli space including the relative position moduli is smooth. The SU(2) transformation properties of such vortices are studied. Our results are then generalized to U(N) gauge theory with N flavors, where the internal moduli space of k=2 axially symmetric vortices is found to be a weighted Grassmannian manifold. It contains singularities along a submanifold.

Minoru Eto; Kenichi Konishi; Giacomo Marmorini; Muneto Nitta; Keisuke Ohashi; Walter Vinci; Naoto Yokoi

2006-07-11T23:59:59.000Z

137

Non-Abelian vortices of higher winding numbers  

SciTech Connect

We make a detailed study of the moduli space of winding number two (k=2) axially symmetric vortices (or equivalently, of coaxial composite of two fundamental vortices), occurring in U(2) gauge theory with two flavors in the Higgs phase, recently discussed by Hashimoto and Tong and by Auzzi, Shifman, and Yung. We find that it is a weighted projective space WCP{sub (2,1,1)}{sup 2}{approx_equal}CP{sup 2}/Z{sub 2}. This manifold contains an A{sub 1}-type (Z{sub 2}) orbifold singularity even though the full moduli space including the relative position moduli is smooth. The SU(2) transformation properties of such vortices are studied. Our results are then generalized to U(N) gauge theory with N flavors, where the internal moduli space of k=2 axially symmetric vortices is found to be a weighted Grassmannian manifold. It contains singularities along a submanifold.

Eto, Minoru [University of Tokyo, Institute of Physics Komaba 3-8-1, Meguro-ku Tokyo 153 (Japan); Konishi, Kenichi; Vinci, Walter [Department of Physics, University of Pisa, Largo Pontecorvo, 3, Ed. C, 56127 Pisa (Italy); INFN, Sezione di Pisa, Largo Pontecorvo, 3, Ed. C, 56127 Pisa (Italy); Marmorini, Giacomo [INFN, Sezione di Pisa, Largo Pontecorvo, 3, Ed. C, 56127 Pisa (Italy); Scuola Normale Superiore, Piazza dei Cavalieri, 7, 56100 Pisa (Italy); Nitta, Muneto [Department of Physics, Keio University, Hiyoshi, Yokohama, Kanagawa 223-8521 (Japan); Ohashi, Keisuke [Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551 (Japan); Yokoi, Naoto [Theoretical Physics Laboratory, The Institute of Physical and Chemical Research (RIKEN), 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan)

2006-09-15T23:59:59.000Z

138

Cooling, Monopoles, and Vortices in SU(2) Lattice Gauge Theory  

E-Print Network (OSTI)

We study monopoles and vortices in SU(2) lattice gauge theory on a 24**4 lattice at beta=2.50. We find a value of fundamental string tension from monopoles in the maximum Abelian gauge consistent with the full SU(2) value. Using direct and indirect center gauges, we find fundamental string tension values from P-vortices which are larger than the full SU(2) result. After a single cooling sweep, the string tensions from monopoles and P-vortices are all 30% lower than the full SU(2) value, while the U(1) string tension in the maximum Abelian gauge remains consistent with the full SU(2) result. Blocking the lattice after cooling does not restore the low values of string tension found with monopoles and vortices.

John D. Stack; William W. Tucker; Alistair Hart

2000-11-13T23:59:59.000Z

139

Potential Vorticity Modeling of the ITCZ and the Hadley Circulation  

Science Journals Connector (OSTI)

A simple zonally symmetric balanced model of the Hadley circulation is presented. The model is based on potential vorticity arguments and consists of a predictive equation for the potential pseudodensity and an invertibility principle to diagnose ...

Wayne H. Schubert; Paul E. Ciesielski; Duane E. Stevens; Hung-Chi Kuo

1991-06-01T23:59:59.000Z

140

magnets  

NLE Websites -- All DOE Office Websites (Extended Search)

I I Painless Physics Articles BEAM COOLING August 2, 1996 By Leila Belkora, Office of Public Affairs ACCELERATION August 16, 1996 By Dave Finley, Accelerator Division Head RF August 30, 1996 By Pat Colestock, Accelerator Division FIXED TARGET PHYSICS September 20, 1996 By Peter H. Garbincius, Physics Section FIXED TARGET PHYSICS PART DEUX October 16, 1996 By Peter H. Garbincius, Physics Section and Leila Belkora, Office of Public Affaris CROSS SECTION November 1, 1996 By Doreen Wackeroth, Theoretical Physics Edited by Leila Belkora, Office of Public Affaris MAGNETS PART I November 15, 1996 By Hank Glass, Technical Support Section Edited by Donald Sena, Office of Public Affairs MAGNETS PART II January 10, 1997 By Hank Glass, Technical Support Section Edited by Donald Sena, Office of Public Affairs

Note: This page contains sample records for the topic "magnetic vortices print" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Equivariant Verlinde formula from fivebranes and vortices  

E-Print Network (OSTI)

We study complex Chern-Simons theory on a Seifert manifold $M_3$ by embedding it into string theory. We show that complex Chern-Simons theory on $M_3$ is equivalent to a topologically twisted supersymmetric theory and its partition function can be naturally regularized by turning on a mass parameter. We find that the dimensional reduction of this theory to 2d gives the low energy dynamics of vortices in four-dimensional gauge theory, the fact apparently overlooked in the vortex literature. We also generalize the relations between 1) the Verlinde algebra, 2) quantum cohomology of the Grassmannian, 3) Chern-Simons theory on $\\Sigma\\times S^1$ and 4) index of a spin$^c$ Dirac operator on the moduli space of flat connections to a new set of relations between 1) the "equivariant Verlinde algebra" for a complex group, 2) the equivariant quantum K-theory of vortex moduli spaces, 3) complex Chern-Simons theory on $\\Sigma \\times S^1$ and 4) the equivariant index of a spin$^c$ Dirac operator on the moduli space of Higg...

Gukov, Sergei

2015-01-01T23:59:59.000Z

142

Photo of the Week: Controlling Chaos with Magnetic Fields | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Controlling Chaos with Magnetic Fields Controlling Chaos with Magnetic Fields Photo of the Week: Controlling Chaos with Magnetic Fields January 18, 2013 - 11:26am Addthis This artistic rendition of "spin vortices" illustrates tiny magnetic vortices that spin according to the polarization of each disk's vortex core. At Argonne National Laboratory, scientists are using alternating magnetic fields to control the behavior of these spin vortices, which are small dots made of iron and nickel. The experiments will help to create new, more efficient magnetic devices -- like the random access memory (RAM) in the device you are using to look at this very photo. Learn more about spin vortices. | Photo courtesy of Sander Munster, Dresden University of Technology.

143

Magnetic activity in stars, discs and quasars  

Science Journals Connector (OSTI)

...stably enough, in 1978 I tried collimation by relativistic vortices in...magnetic models in which the collimation arises from the direction...magnetic eld that permeates the system. A new and exciting role...mechanisms that can produce the collimation from the disc itself. In...

2000-01-01T23:59:59.000Z

144

Peak Effect and the Phase Diagram of Moving Vortices in FexNi1-xZr2 Superconducting Glasses  

Science Journals Connector (OSTI)

In the mixed state of type II superconductors, vortices penetrate the sample and form a correlated system due to the screening of supercurrents around them. Interestingly, we can study this correlated system as a function of density and driving force. The density, for instance, is controlled by the magnetic field B, whereas a current density j acts as a driving force F=j×B on all vortices. To minimize the pinning strength, we study a superconducting glass in which the depinning current is 10 to 1000 times smaller than in previous studies, which enables us to map out the complete phase diagram in this new regime. The diagram is obtained as a function of B, driving current, and temperature, and leads to a remarkable set of new results, which includes a huge peak effect, an additional reentrant depinning phase, and a driving force induced pinning phase.

M. Hilke; S. Reid; R. Gagnon; Z. Altounian

2003-09-18T23:59:59.000Z

145

Drift and ion acoustic wave driven vortices with superthermal electrons  

SciTech Connect

Linear and nonlinear analysis of coupled drift and acoustic mode is presented in an inhomogeneous electron-ion plasma with {kappa}-distributed electrons. A linear dispersion relation is found which shows that the phase speed of both the drift wave and the ion acoustic wave decreases in the presence of superthermal electrons. Several limiting cases are also discussed. In the nonlinear regime, stationary solutions in the form of dipolar and monopolar vortices are obtained. It is shown that the condition for the boundedness of the solution implies that the speed of drift wave driven vortices reduces with increase in superthermality effect. Ignoring density inhomogeniety, it is investigated that the lower and upper limits on the speed of the ion acoustic driven vortices spread with the inclusion of high energy electrons. The importance of results with reference to space plasmas is also pointed out.

Ali Shan, S. [Theoretical Plasma Physics Division, PINSTECH, P.O. Nilore, Islamabad (Pakistan); National Centre For Physics (NCP), Shahdra Valley Road, QAU Campus, 44000 Islamabad (Pakistan); Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad (Pakistan); Haque, Q. [Theoretical Plasma Physics Division, PINSTECH, P.O. Nilore, Islamabad (Pakistan); National Centre For Physics (NCP), Shahdra Valley Road, QAU Campus, 44000 Islamabad (Pakistan)

2012-08-15T23:59:59.000Z

146

Vorticity Preserving Flux Corrected Transport Scheme for the Acoustic Equations  

SciTech Connect

Long term research goals are to develop an improved cell-centered Lagrangian Hydro algorithm with the following qualities: 1. Utilizes Flux Corrected Transport (FCT) to achieve second order accuracy with multidimensional physics; 2. Does not rely on the one-dimensional Riemann problem; and 3. Implements a form of vorticity control. Short term research goals are to devise and implement a 2D vorticity preserving FCT solver for the acoustic equations on an Eulerian mesh: 1. Develop a flux limiting mechanism for systems of governing equations with symmetric wave speeds; 2. Verify the vorticity preserving properties of the scheme; and 3. Compare the performance of the scheme to traditional MUSCL-Hancock and other algorithms.

Lung, Tyler B. [Los Alamos National Laboratory; Roe, Phil [University of Michigan; Morgan, Nathaniel R. [Los Alamos National Laboratory

2012-08-15T23:59:59.000Z

147

Baryonic Bound State of Vortices in Multicomponent Superconductors  

E-Print Network (OSTI)

We construct a bound state of three 1/3-quantized Josephson coupled vortices in three-component superconductors with intrinsic Josephson couplings, which may be relevant with regard to iron-based superconductors. We find a Y-shaped junction of three domain walls connecting the three vortices, resembling the baryonic bound state of three quarks in QCD. The appearance of the Y-junction (but not a Delta-junction) implies that in both cases of superconductors and QCD, the bound state is described by a genuine three-body interaction (but not by the sum of two-body interactions). We also discuss a confinement/deconfinement phase transition.

Muneto Nitta; Minoru Eto; Toshiaki Fujimori; Keisuke Ohashi

2010-11-11T23:59:59.000Z

148

Analysis and identification of vortices within a turbulent channel boundary layer flow  

E-Print Network (OSTI)

understanding of the drag reduction mechanism is still lacking. Vortices play an important role in turbulence structure. Nevertheless, the identification of vortices is still unclear, not even a universal definition of a vortex is accepted. In the present study...

Maroni Veiga, Adrian Gaston

2006-08-16T23:59:59.000Z

149

Stream function-vorticity solution of a buoyancy driven cavity with temperature dependent viscosity  

SciTech Connect

The stream function-vorticity formulation of the Navier-Stokes equations is solved numerically for a buoyancy driven cavity. The method used consists of finite difference approximations of the vorticity transport equation which has been modified to accommodate viscosity gradients in the vorticity dissipation term. Three cases are investigated and each subjected to three levels of grid refinement.

Horstman, R.H. [Boeing Commercial Airplane Group, Seattle, WA (United States)

1995-12-31T23:59:59.000Z

150

Cool Magnetic Molecules  

NLE Websites -- All DOE Office Websites (Extended Search)

Cool Magnetic Molecules Print Cool Magnetic Molecules Print Certain materials are known to heat up or cool down when they are exposed to a changing magnetic field. This is known as the magnetocaloric effect. All magnetic materials exhibit this effect, but in most cases, it is too small to be technologically useful. Recently, however, the search for special molecules with a surprisingly large capacity to keep cool has heated up, driven by environmental and cost considerations as well as by recent improvements in our ability to design, assemble, and probe the structure and chemistry of small molecules. An international collaboration of researchers from Spain, Scotland, and the U.S. has utilized ALS Beamline 11.3.1 (small-molecule crystallography) to characterize the design of such "molecular coolers." The work targets the synthesis of molecular cluster compounds containing many unpaired electrons ("nanomagnets") for applications involving enhanced magnetic refrigeration at very low temperatures.

151

Cool Magnetic Molecules  

NLE Websites -- All DOE Office Websites (Extended Search)

Cool Magnetic Molecules Print Cool Magnetic Molecules Print Certain materials are known to heat up or cool down when they are exposed to a changing magnetic field. This is known as the magnetocaloric effect. All magnetic materials exhibit this effect, but in most cases, it is too small to be technologically useful. Recently, however, the search for special molecules with a surprisingly large capacity to keep cool has heated up, driven by environmental and cost considerations as well as by recent improvements in our ability to design, assemble, and probe the structure and chemistry of small molecules. An international collaboration of researchers from Spain, Scotland, and the U.S. has utilized ALS Beamline 11.3.1 (small-molecule crystallography) to characterize the design of such "molecular coolers." The work targets the synthesis of molecular cluster compounds containing many unpaired electrons ("nanomagnets") for applications involving enhanced magnetic refrigeration at very low temperatures.

152

Cool Magnetic Molecules  

NLE Websites -- All DOE Office Websites (Extended Search)

Cool Magnetic Molecules Print Cool Magnetic Molecules Print Certain materials are known to heat up or cool down when they are exposed to a changing magnetic field. This is known as the magnetocaloric effect. All magnetic materials exhibit this effect, but in most cases, it is too small to be technologically useful. Recently, however, the search for special molecules with a surprisingly large capacity to keep cool has heated up, driven by environmental and cost considerations as well as by recent improvements in our ability to design, assemble, and probe the structure and chemistry of small molecules. An international collaboration of researchers from Spain, Scotland, and the U.S. has utilized ALS Beamline 11.3.1 (small-molecule crystallography) to characterize the design of such "molecular coolers." The work targets the synthesis of molecular cluster compounds containing many unpaired electrons ("nanomagnets") for applications involving enhanced magnetic refrigeration at very low temperatures.

153

Cool Magnetic Molecules  

NLE Websites -- All DOE Office Websites (Extended Search)

Cool Magnetic Molecules Print Cool Magnetic Molecules Print Certain materials are known to heat up or cool down when they are exposed to a changing magnetic field. This is known as the magnetocaloric effect. All magnetic materials exhibit this effect, but in most cases, it is too small to be technologically useful. Recently, however, the search for special molecules with a surprisingly large capacity to keep cool has heated up, driven by environmental and cost considerations as well as by recent improvements in our ability to design, assemble, and probe the structure and chemistry of small molecules. An international collaboration of researchers from Spain, Scotland, and the U.S. has utilized ALS Beamline 11.3.1 (small-molecule crystallography) to characterize the design of such "molecular coolers." The work targets the synthesis of molecular cluster compounds containing many unpaired electrons ("nanomagnets") for applications involving enhanced magnetic refrigeration at very low temperatures.

154

Cool Magnetic Molecules  

NLE Websites -- All DOE Office Websites (Extended Search)

Cool Magnetic Molecules Print Cool Magnetic Molecules Print Certain materials are known to heat up or cool down when they are exposed to a changing magnetic field. This is known as the magnetocaloric effect. All magnetic materials exhibit this effect, but in most cases, it is too small to be technologically useful. Recently, however, the search for special molecules with a surprisingly large capacity to keep cool has heated up, driven by environmental and cost considerations as well as by recent improvements in our ability to design, assemble, and probe the structure and chemistry of small molecules. An international collaboration of researchers from Spain, Scotland, and the U.S. has utilized ALS Beamline 11.3.1 (small-molecule crystallography) to characterize the design of such "molecular coolers." The work targets the synthesis of molecular cluster compounds containing many unpaired electrons ("nanomagnets") for applications involving enhanced magnetic refrigeration at very low temperatures.

155

J. Fluid Mech. (2009), vol. 622, pp. 121. c 2009 Cambridge University Press doi:10.1017/S0022112008004023 Printed in the United Kingdom  

E-Print Network (OSTI)

(Received 29 April 2007 and in revised form 20 July 2008) The stability of the recirculation bubble behind0022112008004023 Printed in the United Kingdom 1 Direct and adjoint global modes of a recirculation bubble: lift to a deformation of the recirculation bubble in which streamwise vortices induce low- and high-speed streaks

Paris-Sud XI, Université de

156

X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation  

NLE Websites -- All DOE Office Websites (Extended Search)

X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation Print Wednesday, 25 November 2009 00:00 Magnetic...

157

Vorticity banding in rodlike virus suspensions Kyongok Kang,1  

E-Print Network (OSTI)

Vorticity banding in rodlike virus suspensions Kyongok Kang,1 M. P. Lettinga,1 Z. Dogic,2 and Jan K. G. Dhont1 1 Institute für Festkörper Forschung (IFF), Weiche Materie, Forschungszentrum Jülich, D

Fraden, Seth

158

The Advection of Mesoscale Atmospheric Vortices over Reykjavík  

Science Journals Connector (OSTI)

On 12 August 2009, a series of satellite images revealed asymmetric shedding of atmospheric vortices in the lee of Mt. Snæfellsjökull, and their passage a distance of 120 km across Faxaflói Bay and over the city of Reykjavík in West Iceland. After ...

Hálfdán Ágústsson; Haraldur Ólafsson

2014-10-01T23:59:59.000Z

159

Control of Kirchhoff vortices by a resonant strain L. Friedland*  

E-Print Network (OSTI)

the frequency of oscillations of the strain rate. In real applica- tions, this result must pass stability testControl of Kirchhoff vortices by a resonant strain L. Friedland* Racah Institute of Physics, Hebrew, but oscillating strain rate with chirped oscillation frequency, allows adiabatic control of the axis ratio a

Friedland, Lazar

160

Effects of vortical and entropic forcing on detonation dynamics  

E-Print Network (OSTI)

Effects of vortical and entropic forcing on detonation dynamics L. Massa, M. Chauhan, and F.K. Lu 1 Introduction Experiments [3] have shown that detonations in non-ideal conditions, i.e., subject to strong combustion. The present research examines the interaction of detonation with turbulence with emphasis

Texas at Arlington, University of

Note: This page contains sample records for the topic "magnetic vortices print" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Quantized vortices in an excitonpolariton K. G. LAGOUDAKIS1  

E-Print Network (OSTI)

Te microcavity sample was used as in our previous studies3,16,17 . The polariton condensate was created by meansLETTERS Quantized vortices in an exciton­polariton condensate K. G. LAGOUDAKIS1 *, M. WOUTERS2 in an interacting Bose gas at low temperature is superfluidity. First observed in liquid 4 He, this phenomenon has

Loss, Daniel

162

Offset Printing, Production Services  

NLE Websites -- All DOE Office Websites (Extended Search)

Printing Printing Our full service print shop provides prepress services, single and multicolor offset printing, and complete bindery. We print Reports Forms Brochures, leaflets and flyers Name tags and meal tickets Newsletters, etc Prepress Electronic files and paper copy prepared for printing. Complete Bindery Apply address labels or tabs to printed material. Machine fold documents and insert into envelopes for mailing. Laminate printed items up to 35" wide. Numbering and perforating. Trimming, drilling, padding and stitching. Special Printing Special reports, full color printing, continuous and carbon forms printed through the U.S. Government Printing Office. Additional Information Printing can be reached on X2953 The supervisor is Rick Backofen who can be reached on X6183

163

Mon. Not. R. Astron. Soc. 000, 114 (2002) Printed 7 December 2007 (MN LATEX style file v2.2) Characterisation of the magnetic field of the  

E-Print Network (OSTI)

Herbig Ae/Be star should be magnetic with a magnetic topology similar to that of main sequence: HD 200775 ­ Instrumentation : spectropolarimetry. Based on observations obtained at the Canada-France-Hawaii

164

A study of vorticity formation in high energy nuclear collisions  

E-Print Network (OSTI)

We present a quantitative study of vorticity formation in peripheral ultrarelativistic heavy ion collisions at sqrt(s_NN) = 200 GeV by using the ECHO-QGP numerical code, implementing relativistic dissipative hydrodynamics in the causal Israel-Stewart framework in 3+1 dimensions with an initial Bjorken flow profile. We consider and discuss different definitions of vorticity which are relevant in relativistic hydrodynamics. After demonstrating the excellent capabilities of our code, we show that, with the initial conditions needed to reproduce the measured directed flow in peripheral collisions corresponding to an average impact parameter b=11.6 fm and with the Bjorken flow profile for a viscous Quark Gluon Plasma with eta/s=0.16 fixed, a vorticity of up to 0.05 c/fm can develop at freezeout. The ensuing polarization of Lambda baryons is at most of the order of 1% at midrapidity. We show that the amount of developed directed flow is sensitive to both the initial angular momentum of the plasma and its viscosity.

Becattini, F; Rolando, V; Beraudo, A; Del Zanna, L; De Pace, A; Nardi, M; Pagliara, G; Chandra, V

2015-01-01T23:59:59.000Z

165

Printing | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Employee Services » Printing Employee Services » Printing Printing The Printing Team is the liaison between the U.S. Government Printing Office and the Department of Energy. It consists of an expert group of printing specialists who offer a full range of services from assistance in developing your printing requirements to the final printing, distribution and mailing of products. The printed products range from black and white to full color items. These Services are available through the Working Capital Fund. The Printing Office produces a complete range of high-quality printed products comparable to those available from a full-service commercial enterprise. These include: Reports Books Pamphlets and Brochures Public Information Materials Presentation and Promotional Posters Forms and Letterhead

166

Magnetization reversal via single and double vortex states in submicron Permalloy ellipses P. Vavassori,1  

E-Print Network (OSTI)

Magnetization reversal via single and double vortex states in submicron Permalloy ellipses P University, Ithaca, New York, USA Received December 5, 2003; published 3 June 2004 The magnetization reversal of the magnetic field and to occur via the formation of one or two vortices; the one vortex state is nucleated

Metlushko, Vitali

167

The Astrophysical Journal, 702:3949, 2009 September 1 doi:10.1088/0004-637X/702/1/39 C 2009. The American Astronomical Society. All rights reserved. Printed in the U.S.A.  

E-Print Network (OSTI)

. The American Astronomical Society. All rights reserved. Printed in the U.S.A. SHOCK-GENERATED VORTICITY fields of astrophysics. The form of the IMF plays a central role in subjects as diverse as galactic at low stellar masses with a power-law tail at masses exceeding a solar mass (e.g., Chabrier 2003

Kevlahan, Nicholas

168

Three-Dimensional Nonlinear Lattices: From Oblique Vortices and Octupoles to Discrete Diamonds and Vortex Cubes  

Science Journals Connector (OSTI)

We construct a variety of novel localized topological structures in the 3D discrete nonlinear Schrödinger equation. The states can be created in Bose-Einstein condensates trapped in strong optical lattices and crystals built of microresonators. These new structures, most of which have no counterparts in lower dimensions, range from multipole patterns and diagonal vortices to vortex “cubes” (stack of two quasiplanar vortices) and “diamonds” (formed by two orthogonal vortices).

R. Carretero-González; P. G. Kevrekidis; B. A. Malomed; D. J. Frantzeskakis

2005-05-23T23:59:59.000Z

169

MO-A-9A-01: Innovation in Medical Physics Practice: 3D Printing Applications  

Science Journals Connector (OSTI)

3D printing also called additive manufacturing has great potential to advance the field of medicine. Many medical uses have been exhibited from facial reconstruction to the repair of pulmonary obstructions. The strength of 3D printing is to quickly convert a 3D computer model into a physical object. Medical use of 3D models is already ubiquitous with technologies such as computed tomography and magnetic resonance imaging. Thus tailoring 3D printing technology to medical functions has the potential to impact patient care. This session will discuss applications to the field of Medical Physics. Topics discussed will include introduction to 3D printing methods as well as examples of real-world uses of 3D printing spanning clinical and research practice in diagnostic imaging and radiation therapy. The session will also compare 3D printing to other manufacturing processes and discuss a variety of uses of 3D printing technology outside the field of Medical Physics.

2014-01-01T23:59:59.000Z

170

Interaction of half-quantized vortices in two-component Bose-Einstein condensates  

SciTech Connect

We study the asymptotic interaction between two half-quantized vortices in two-component Bose-Einstein condensates. When two vortices in different components are placed at distance 2R, the leading order of the force between them is found to be (lnR/{xi}-1/2)/R{sup 3}, in contrast to 1/R between vortices placed in the same component. We derive it analytically using the Abrikosov ansatz and the profile functions of the vortices, confirmed numerically with the Gross-Pitaevskii model. We also find that the short-range cutoff of the intervortex potential linearly depends on the healing length.

Eto, Minoru [Department of Physics, Yamagata University, Yamagata 990-8560 (Japan); Kasamatsu, Kenichi [Department of Physics, Kinki University, Higashi-Osaka, 577-8502 (Japan); Nitta, Muneto [Department of Physics, and Research and Education Center for Natural Sciences, Keio University, Hiyoshi 4-1-1, Yokohama, Kanagawa 223-8521 (Japan); Takeuchi, Hiromitsu [Graduate School of Integrated Arts and Science, Hiroshima University, Kagamiyama, 1-7-1, Higashi Hiroshima, 739-8521 (Japan); Tsubota, Makoto [Department of Physics, Osaka City University, Sumiyoshi-Ku, Osaka 558-8585 (Japan)

2011-06-15T23:59:59.000Z

171

Interaction of half-quantized vortices in two-component Bose-Einstein condensates  

E-Print Network (OSTI)

We study the asymptotic interaction between two half-quantized vortices in two-component Bose-Einstein condensates. When two vortices in different components are placed at distance 2R, the leading order of the force between them is found to be (log R/\\xi-1/2)/R^3, in contrast to 1/R between vortices placed in the same component. We derive it analytically using the Abrikosov ansatz and the profile functions of the vortices, confirmed numerically with the Gross-Pitaevskii model. We also find that the short-range cutoff of the inter-vortex potential linearly depends on the healing length.

Minoru Eto; Kenichi Kasamatsu; Muneto Nitta; Hiromitsu Takeuchi; Makoto Tsubota

2011-03-31T23:59:59.000Z

172

Active Vorticity Control in a Shear Flow Using a Flapping Foil  

E-Print Network (OSTI)

It is shown experimentally that free shear flows can be substantially altered through direct control of the large coherent vortices present in the flow.

Gopalkrishnan, R.

1994-01-01T23:59:59.000Z

173

A turbulence model for buoyant flows based on vorticity generation.  

SciTech Connect

A turbulence model for buoyant flows has been developed in the context of a k-{var_epsilon} turbulence modeling approach. A production term is added to the turbulent kinetic energy equation based on dimensional reasoning using an appropriate time scale for buoyancy-induced turbulence taken from the vorticity conservation equation. The resulting turbulence model is calibrated against far field helium-air spread rate data, and validated with near source, strongly buoyant helium plume data sets. This model is more numerically stable and gives better predictions over a much broader range of mesh densities than the standard k-{var_epsilon} model for these strongly buoyant flows.

Domino, Stefan Paul; Nicolette, Vernon F.; O'Hern, Timothy John; Tieszen, Sheldon R.; Black, Amalia Rebecca

2005-10-01T23:59:59.000Z

174

Disorder-Induced Microscopic Magnetic Memory  

NLE Websites -- All DOE Office Websites (Extended Search)

Disorder-Induced Microscopic Magnetic Memory Print Disorder-Induced Microscopic Magnetic Memory Print The magnetic-recording industry deliberately introduces carefully controlled disorder into its materials to obtain the desired magnetic properties. But as the density of magnetic disks climbs, the size of the magnetic domains responsible for storage must decrease, posing new challenges. Beautiful theories based on random microscopic disorder have been developed over the past ten years. To directly compare these theories with precise experiments, an American-European team, led by researchers from the University of Washington, Seattle, first developed and then applied coherent x-ray speckle metrology to microscopic magnetic domains in a series of thin multilayer perpendicular magnetic materials of varying disorder. Their results, at odds with all previous theories, have set a new reference point for future theories.

175

Disorder-Induced Microscopic Magnetic Memory  

NLE Websites -- All DOE Office Websites (Extended Search)

Disorder-Induced Microscopic Magnetic Memory Print Disorder-Induced Microscopic Magnetic Memory Print The magnetic-recording industry deliberately introduces carefully controlled disorder into its materials to obtain the desired magnetic properties. But as the density of magnetic disks climbs, the size of the magnetic domains responsible for storage must decrease, posing new challenges. Beautiful theories based on random microscopic disorder have been developed over the past ten years. To directly compare these theories with precise experiments, an American-European team, led by researchers from the University of Washington, Seattle, first developed and then applied coherent x-ray speckle metrology to microscopic magnetic domains in a series of thin multilayer perpendicular magnetic materials of varying disorder. Their results, at odds with all previous theories, have set a new reference point for future theories.

176

Cool Magnetic Molecules  

NLE Websites -- All DOE Office Websites (Extended Search)

Cool Magnetic Molecules Cool Magnetic Molecules Cool Magnetic Molecules Print Wednesday, 25 May 2011 00:00 Certain materials are known to heat up or cool down when they are exposed to a changing magnetic field. This is known as the magnetocaloric effect. All magnetic materials exhibit this effect, but in most cases, it is too small to be technologically useful. Recently, however, the search for special molecules with a surprisingly large capacity to keep cool has heated up, driven by environmental and cost considerations as well as by recent improvements in our ability to design, assemble, and probe the structure and chemistry of small molecules. An international collaboration of researchers from Spain, Scotland, and the U.S. has utilized ALS Beamline 11.3.1 (small-molecule crystallography) to characterize the design of such "molecular coolers." The work targets the synthesis of molecular cluster compounds containing many unpaired electrons ("nanomagnets") for applications involving enhanced magnetic refrigeration at very low temperatures.

177

Building of a Novel Mn12 Single Molecule Magnet by Assembly of...  

NLE Websites -- All DOE Office Websites (Extended Search)

Building of a Novel Mn12 Single Molecule Magnet by Assembly of Anisotropic Triangles Building of a Novel Mn12 Single Molecule Magnet by Assembly of Anisotropic Triangles Print...

178

Vortices and Rossby waves in cylinder wakes on a parabolic -plane observed by altimetric imaging velocimetry  

E-Print Network (OSTI)

, geostrophic and gradient wind velocity, and potential vorticity fields with very high spatial resolutionVortices and Rossby waves in cylinder wakes on a parabolic -plane observed by altimetric imaging in the wake of a circular cylinder are investigated in a rotating parabolic polar -plane fluid. This system

Afanassiev, Iakov

179

Effects of sample geometry on the dynamics and configurations of vortices in mesoscopic superconductors  

E-Print Network (OSTI)

of sample size and cross-sectional shape on vortex nucleation and penetration. As is well known, more vortices enter the sample as the sample size grows. It is also found that if a small indentation is made on the sample boundary, vortices can be made...

Kim, Sangbum; Burkardt, John; Gunzburger, Max; Peterson, Janet.

2007-01-01T23:59:59.000Z

180

Two-dimensional solitons with hidden and explicit vorticity in bimodal cubic-quintic media A. S. Desyatnikov,1  

E-Print Network (OSTI)

solitons of the type m,-m , whose net vorticity is zero. Stability regions for the vortices of both m, ±m types are identified for m=1, 2, and 3, by dint of the calculation of stability eigenvalues of the cores, there remains a zero-vorticity breather with persistent internal vibrations. DOI: 10.1103/Phys

Note: This page contains sample records for the topic "magnetic vortices print" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Generation of large-scale vorticity in a homogeneous turbulence with a mean velocity shear Tov Elperin,* Nathan Kleeorin,  

E-Print Network (OSTI)

Generation of large-scale vorticity in a homogeneous turbulence with a mean velocity shear Tov by the gradient of the Reynolds stresses is studied. Generation of a mean vorticity in a homogeneous-induced'' deflection of equilibrium mean vorticity and ``Reynolds stress-induced'' generation of perturbations of mean

Elperin, Tov

182

Direct Imaging of Asymmetric Magnetization Reversal  

NLE Websites -- All DOE Office Websites (Extended Search)

Direct Imaging of Asymmetric Magnetization Reversal Print Direct Imaging of Asymmetric Magnetization Reversal Print The phenomenon of exchange bias has transformed how data is read on magnetic hard disks and created an explosion in their information storage density. However, it remains poorly understood, and even the fundamental mechanism of magnetic reversal for exchange-biased systems in changing magnetic fields is unclear. By using x-ray photoemission electron microscopy at the ALS to directly image the magnetic structure of an exchange-biased film, a team from the University of Washington and the Stanford Synchrotron Radiation Laboratory has identified separate magnetic-reversal mechanisms in the two branches of a hysteresis loop. This advance in fundamental understanding will provide new insights for developing the next generation of information storage and sensing devices where exchange bias is expected to play a critical role.

183

Manipulating Josephson junctions in thin-films by nearby vortices  

SciTech Connect

It is shown that a vortex trapped in one of the banks of a planar edge-type Josephson junction in a narrow thin-film superconducting strip can change drastically the dependence of the junction critical current on the applied field, I-c(H). When the vortex is placed at certain discrete positions in the strip middle, the pattern I-c(H) has zero at H = 0 instead of the traditional maximum of '0-type' junctions. The number of these positions is equal to the number of vortices trapped at the same location. When the junction-vortex separation exceeds similar to W, the strip width, I-c(H) is no longer sensitive to the vortex presence. The same is true for any separation if the vortex approaches the strip edges. (C) 2014 Elsevier B.V. All rights reserved.

Kogan, V.G.; Mints, R.G.

2014-07-01T23:59:59.000Z

184

Zero modes of six-dimensional Abelian vortices  

E-Print Network (OSTI)

We analyze the fluctuations of Nielsen-Olesen vortices arising in the six-dimensional Abelian-Higgs model. The regular geometry generated by the defect breaks spontaneously six-dimensional Poincar\\'e symmetry leading to a warped space-time with finite four-dimensional Planck mass. As a consequence, the zero mode of the spin two fluctuations of the geometry is always localized but the graviphoton fields, corresponding to spin one metric fluctuations, give rise to zero modes which are not localized either because of their behaviour at infinity or because of their behaviour near the core of the vortex. A similar situation occurs for spin zero fluctuations. Gauge field fluctuations exhibit a localized zero mode.

Massimo Giovannini; Jean-Vincent Le Be; Stephane Riederer

2002-05-21T23:59:59.000Z

185

X-Ray Diffraction Microscopy of Magnetic Structures  

NLE Websites -- All DOE Office Websites (Extended Search)

X-Ray Diffraction Microscopy of Magnetic Structures Print science brief icon Scientists working at ALS Beamline 12.0.2.2 have demonstrated a new x-ray technique for producing...

186

Averaging over fast gravity waves for geophysical flows with arbitrary potential vorticity  

SciTech Connect

Here a mathematically rigorous framework is developed for deriving new reduced simplified dynamical equations for geophysical flows with arbitrary potential vorticity interacting with fast gravity waves. The examples include the rotating Boussinesq and rotating shallow water equations in the quasigeostrophic limit with vanishing Rossby number. For the spatial periodic case the theory implies that the quasi-geostrophic equations are valid limiting equations in the weak topology for arbitrary initial data. Furthermore, simplified reduced equations are developed for the fashion in which the vortical waves influence the gravity waves through averaging over specific gravity wave/vortical resonances. 18 refs.

Embid, P.F. [Princeton Univ., NJ (United States); Majda, A.J. [New York Univ., New York, NY (United States)

1996-12-31T23:59:59.000Z

187

Core sizes and dynamical instabilities of giant vortices in dilute Bose-Einstein condensates  

SciTech Connect

Motivated by a recent demonstration of cyclic addition of quantized vorticity into a Bose-Einstein condensate, the vortex pump, we study dynamical instabilities and core sizes of giant vortices. The core size is found to increase roughly as a square-root function of the quantum number of the vortex, whereas the strength of the dynamical instability either saturates to a fairly low value or increases extremely slowly for large quantum numbers. Our studies suggest that giant vortices of very high angular momenta may be achieved by gradually increasing the operation frequency of the vortex pump.

Kuopanportti, Pekko; Lundh, Emil; Huhtamaeki, Jukka A. M.; Pietilae, Ville; Moettoenen, Mikko [Department of Applied Physics/COMP, Aalto University School of Science and Technology, P.O. Box 15100, FI-00076 AALTO (Finland); Department of Physics, Umeaa University, SE-90187 Umeaa (Sweden); Department of Applied Physics/COMP, Aalto University School of Science and Technology, P.O. Box 15100, FI-00076 AALTO, Finland and Department of Physics, Okayama University, Okayama 700-8530 (Japan); Department of Applied Physics/COMP, Aalto University School of Science and Technology, P.O. Box 15100, FI-00076 AALTO, Finland and Australian Research Council Centre of Excellence for Quantum Computer Technology, School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney NSW 2052 (Australia); Department of Applied Physics/COMP, Aalto University School of Science and Technology, P.O. Box 15100, FI-00076 AALTO, Finland, Australian Research Council Centre of Excellence for Quantum Computer Technology, School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney NSW 2052 (Australia) and Low Temperature Laboratory, Aalto University School of Science and Technology, P.O. Box 13500, FI-00076 AALTO (Finland)

2010-02-15T23:59:59.000Z

188

Nuclear vorticity and the low-energy nuclear response - Towards the neutron drip line  

E-Print Network (OSTI)

The transition density and current provide valuable insight into the nature of nuclear vibrations. Nuclear vorticity is a quantity related to the transverse transition current. In this work, we study the evolution of the strength distribution, related to density fluctuations, and the vorticity strength distribution, as the neutron drip line is approached. Our results on the isoscalar, natural-parity multipole response of Ni isotopes, obtained by using a self-consistent Skyrme-Hartree-Fock + Continuum RPA model, indicate that, close to the drip line, the low-energy response is dominated by L>1 vortical transitions.

P. Papakonstantinou; J. Wambach; E. Mavrommatis; V. Yu. Ponomarev

2004-11-16T23:59:59.000Z

189

Development of North Atlantic Tropical Disturbances Near Upper-Level Potential Vorticity Streamers  

Science Journals Connector (OSTI)

Tropical cyclone (TC) development near upper-level potential vorticity (PV) streamers in the North Atlantic is studied from synoptic climatology, composite, and case study perspectives. Midlatitude anticyclonic wave breaking is instrumental in ...

Thomas J. Galarneau; Jr.; Ron McTaggart-Cowan; Lance F. Bosart; Christopher A. Davis

190

Three-dimensional vortical structures in the wake of a flexible flapping foil  

E-Print Network (OSTI)

This project aims to gain a qualitative view of the three-dimensional vortical structures of a flexible flapping foil at Reynolds number 164. Flexible foils were fabricated, coated with fluorescent dye, and towed with heave ...

Krueger, Matthew J

2005-01-01T23:59:59.000Z

191

The Vorticity Balance of the Ocean Surface in Hawaii from a Regional Reanalysis.  

Science Journals Connector (OSTI)

The ocean surface vorticity budget around the Hawaiian islands is examined using an 18 month model reanalysis generated using four-dimensional variational state estimation with all available observations (satellite, in situ, and high-frequency ...

Joao Marcos Azevedo Correia de Souza; Brian Powell; Alma Carolina Castillo-Trujillo; Pierre Flament

192

Identification and ERA-15 Climatology of Potential Vorticity Streamers and Cutoffs near the Extratropical Tropopause  

Science Journals Connector (OSTI)

A novel approach is introduced to identify potential vorticity (PV) streamers and cutoffs as indicators of Rossby wave breaking near the extratropical tropopause and to compile climatologies of these features on different isentropic surfaces. The ...

Heini Wernli; Michael Sprenger

2007-05-01T23:59:59.000Z

193

A Climatology of Midlatitude Mesoscale Convective Vortices in the Rapid Update Cycle  

Science Journals Connector (OSTI)

Climatological characteristics of mesoscale convective vortices (MCVs) occurring in the state of Oklahoma during the late spring and summer of four years are investigated. The MCV cases are selected based on vortex detection by an objective ...

Eric P. James; Richard H. Johnson

2010-05-01T23:59:59.000Z

194

Structural development of vortical flows around a square jet in cross-flow  

Science Journals Connector (OSTI)

...1324 Structural development of vortical flows...the structural development of the entire...the structural development of the jet wake...computer hardware technology and computational...sewerage outfalls, gas- turbine cooling, and...

2004-01-01T23:59:59.000Z

195

Combined effect of viscosity and vorticity on single mode Rayleigh-Taylor instability bubble growth  

SciTech Connect

The combined effect of viscosity and vorticity on the growth rate of the bubble associated with single mode Rayleigh-Taylor instability is investigated. It is shown that the effect of viscosity on the motion of the lighter fluid associated with vorticity accumulated inside the bubble due to mass ablation may be such as to reduce the net viscous drag on the bubble exerted by the upper heavier fluid as the former rises through it.

Banerjee, Rahul; Mandal, Labakanta; Roy, S.; Khan, M.; Gupta, M. R. [Department of Instrumentation Science and Centre for Plasma Studies, Jadavpur University, Kolkata 700032 (India)

2011-02-15T23:59:59.000Z

196

Gravito-magnetic vacuum spacetimes: kinematic restrictions  

E-Print Network (OSTI)

We show that there are no vacuum solutions with a purely magnetic Weyl tensor with respect to an observer submitted to kinematic restrictions involving first order differential scalars. This result generalizes previous ones for the vorticity-free and shear-free cases. We use a covariant approach which makes evident that only the Bianchi identities are used and, consequently, the results are also valid for non vacuum solutions with vanishing Cotton tensor.

J. J. Ferrando; J. A. Saez

2003-03-12T23:59:59.000Z

197

Large Magnetization at Carbon Surfaces  

NLE Websites -- All DOE Office Websites (Extended Search)

Large Magnetization at Carbon Surfaces Print Large Magnetization at Carbon Surfaces Print From organic matter to pencil lead, carbon is a versatile element. Now, another use has been found: magnets. One would not expect pure carbon to be magnetic, but for more than ten years scientists have suspected that carbon can be made to be magnetic by doping it with nonmagnetic materials, changing its order ever so slightly. Years ago, the first x-ray images obtained using the scanning transmission x-ray microscope at ALS Beamline 11.0.2 provided valuable insight into how proton irradiation can cause carbon to transform into a ferromagnetic material. Now, researchers are using x-ray spectroscopy at ALS Beamline 4.0.2 to study the magnetism of proton-irradiated graphite surfaces in order to understand the effects of hydrogen (i.e. protons) on the electronic structure of carbon. In studying the properties of electrons responsible for magnetic order in graphite, researchers found that a very large magnetic moment is essentially switched on when hydrogen atoms are incorporated at the surface of graphite.

198

Large Magnetization at Carbon Surfaces  

NLE Websites -- All DOE Office Websites (Extended Search)

Large Magnetization at Carbon Surfaces Print Large Magnetization at Carbon Surfaces Print From organic matter to pencil lead, carbon is a versatile element. Now, another use has been found: magnets. One would not expect pure carbon to be magnetic, but for more than ten years scientists have suspected that carbon can be made to be magnetic by doping it with nonmagnetic materials, changing its order ever so slightly. Years ago, the first x-ray images obtained using the scanning transmission x-ray microscope at ALS Beamline 11.0.2 provided valuable insight into how proton irradiation can cause carbon to transform into a ferromagnetic material. Now, researchers are using x-ray spectroscopy at ALS Beamline 4.0.2 to study the magnetism of proton-irradiated graphite surfaces in order to understand the effects of hydrogen (i.e. protons) on the electronic structure of carbon. In studying the properties of electrons responsible for magnetic order in graphite, researchers found that a very large magnetic moment is essentially switched on when hydrogen atoms are incorporated at the surface of graphite.

199

Large Magnetization at Carbon Surfaces  

NLE Websites -- All DOE Office Websites (Extended Search)

Large Magnetization at Carbon Surfaces Print Large Magnetization at Carbon Surfaces Print From organic matter to pencil lead, carbon is a versatile element. Now, another use has been found: magnets. One would not expect pure carbon to be magnetic, but for more than ten years scientists have suspected that carbon can be made to be magnetic by doping it with nonmagnetic materials, changing its order ever so slightly. Years ago, the first x-ray images obtained using the scanning transmission x-ray microscope at ALS Beamline 11.0.2 provided valuable insight into how proton irradiation can cause carbon to transform into a ferromagnetic material. Now, researchers are using x-ray spectroscopy at ALS Beamline 4.0.2 to study the magnetism of proton-irradiated graphite surfaces in order to understand the effects of hydrogen (i.e. protons) on the electronic structure of carbon. In studying the properties of electrons responsible for magnetic order in graphite, researchers found that a very large magnetic moment is essentially switched on when hydrogen atoms are incorporated at the surface of graphite.

200

Large Magnetization at Carbon Surfaces  

NLE Websites -- All DOE Office Websites (Extended Search)

Large Magnetization at Carbon Surfaces Print Large Magnetization at Carbon Surfaces Print From organic matter to pencil lead, carbon is a versatile element. Now, another use has been found: magnets. One would not expect pure carbon to be magnetic, but for more than ten years scientists have suspected that carbon can be made to be magnetic by doping it with nonmagnetic materials, changing its order ever so slightly. Years ago, the first x-ray images obtained using the scanning transmission x-ray microscope at ALS Beamline 11.0.2 provided valuable insight into how proton irradiation can cause carbon to transform into a ferromagnetic material. Now, researchers are using x-ray spectroscopy at ALS Beamline 4.0.2 to study the magnetism of proton-irradiated graphite surfaces in order to understand the effects of hydrogen (i.e. protons) on the electronic structure of carbon. In studying the properties of electrons responsible for magnetic order in graphite, researchers found that a very large magnetic moment is essentially switched on when hydrogen atoms are incorporated at the surface of graphite.

Note: This page contains sample records for the topic "magnetic vortices print" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Magnetization curves for thin films of layered type-II superconductors, Kolmogorov-Arnold-Moser theory, and the devil's staircase  

SciTech Connect

Magnetization curves for a thin-layered superconducting film in parallel magnetic field have been shown to become devil's staircases provided the superconducting layers are perpendicular to the film plane. The transition from an incomplete to a complete devil's staircase with decreasing temperature is predicted. A chain of vortices is described by the generalized Frenkel-Kontorova model.

Burkov, S.E. (Laboratory of Atomic and Solid State Physics, Clark Hall, Cornell University, Ithaca, New York (USA) Landau Institute for Theoretical Physics, Moscow (U.S.S.R))

1991-08-01T23:59:59.000Z

202

WirePrint: 3D printed previews for fast prototyping  

Science Journals Connector (OSTI)

Even though considered a rapid prototyping tool, 3D printing is so slow that a reasonably sized object requires printing overnight. This slows designers down to a single iteration per day. In this paper, we propose to instead print low-fidelity wireframe ... Keywords: 3D printing, rapid prototyping

Stefanie Mueller, Sangha Im, Serafima Gurevich, Alexander Teibrich, Lisa Pfisterer, François Guimbretière, Patrick Baudisch

2014-10-01T23:59:59.000Z

203

Hidden Rotational Symmetries in Magnetic Domain Patterns  

NLE Websites -- All DOE Office Websites (Extended Search)

Hidden Rotational Symmetries in Magnetic Domain Patterns Print Hidden Rotational Symmetries in Magnetic Domain Patterns Print Magnetic thin films have complicated domain patterns that may or may not repeat with each cycle through a hysteresis loop. A magnetic thin film with perpendicular anisotropy, such as that used in computer hard drives, for example, commonly exhibits labyrinthine domain patterns. These patterns are disordered over a macroscopic length scale, and intuitively we do not expect to observe any symmetry in such systems. Scientists at the ALS, the University of Oregon, and the University of California, San Diego, have recently used coherent soft x-ray scattering with angular Fourier analysis to discover that the disordered domain patterns do, in fact, exhibit rotational symmetries, which can be as small as two-fold or as large as 30-fold. Their study of magnetic symmetries gives scientists a toolbox for discovering hidden symmetries in diverse material systems.

204

X-Ray Diffraction Microscopy of Magnetic Structures  

NLE Websites -- All DOE Office Websites (Extended Search)

X-Ray Diffraction Microscopy of Magnetic Structures Print X-Ray Diffraction Microscopy of Magnetic Structures Print science brief icon Scientists working at ALS Beamline 12.0.2.2 have demonstrated a new x-ray technique for producing short-exposure nanoscale images of the magnetic structure of materials. The new method combines aspects of coherent x-ray diffraction, which can determine 3-D charge distributions, and resonant magnetic scattering, which is sensitive to magnetic structures. Physicists have used coherent x-ray diffraction to measure the electron density of complicated molecules. The formula used to make these calculations contains terms that relate to the electron spin of magnetic atoms, but these terms are traditionally ignored since coherent x-ray diffraction has not been used to retrieve magnetic information. Using the full formula allows for the determination of not only the electron density, but also the magnetic spin distribution and its orientation.

205

X-Ray Diffraction Microscopy of Magnetic Structures  

NLE Websites -- All DOE Office Websites (Extended Search)

X-Ray Diffraction Microscopy of Magnetic Structures Print X-Ray Diffraction Microscopy of Magnetic Structures Print science brief icon Scientists working at ALS Beamline 12.0.2.2 have demonstrated a new x-ray technique for producing short-exposure nanoscale images of the magnetic structure of materials. The new method combines aspects of coherent x-ray diffraction, which can determine 3-D charge distributions, and resonant magnetic scattering, which is sensitive to magnetic structures. Physicists have used coherent x-ray diffraction to measure the electron density of complicated molecules. The formula used to make these calculations contains terms that relate to the electron spin of magnetic atoms, but these terms are traditionally ignored since coherent x-ray diffraction has not been used to retrieve magnetic information. Using the full formula allows for the determination of not only the electron density, but also the magnetic spin distribution and its orientation.

206

X-Ray Diffraction Microscopy of Magnetic Structures  

NLE Websites -- All DOE Office Websites (Extended Search)

X-Ray Diffraction Microscopy of Magnetic Structures Print X-Ray Diffraction Microscopy of Magnetic Structures Print science brief icon Scientists working at ALS Beamline 12.0.2.2 have demonstrated a new x-ray technique for producing short-exposure nanoscale images of the magnetic structure of materials. The new method combines aspects of coherent x-ray diffraction, which can determine 3-D charge distributions, and resonant magnetic scattering, which is sensitive to magnetic structures. Physicists have used coherent x-ray diffraction to measure the electron density of complicated molecules. The formula used to make these calculations contains terms that relate to the electron spin of magnetic atoms, but these terms are traditionally ignored since coherent x-ray diffraction has not been used to retrieve magnetic information. Using the full formula allows for the determination of not only the electron density, but also the magnetic spin distribution and its orientation.

207

Electronic Structure and Magnetism in Diluted Magnetic Semiconductors  

NLE Websites -- All DOE Office Websites (Extended Search)

Electronic Structure and Magnetism in Diluted Magnetic Semiconductors Print Electronic Structure and Magnetism in Diluted Magnetic Semiconductors Print The possibility of using electrons' spins in addition to their charge in information technology has created much enthusiasm for a new field of electronics popularly known as "spintronics." An intensely studied approach to obtaining spin-polarized carriers for data-storage devices is the use of diluted magnetic semiconductors created by doping ions like Mn, Fe, or Co having a net spin into a semiconducting host such as GaAs, ZnO, or GaN. The interaction among these spins leads to ferromagnetic order at low temperatures, which is necessary to create spin-polarized carriers. A research team working at ALS Beamline 4.0.2 and European Synchrotron Radiation Facility Beamline ID8 made a big leap forward in clarifying the microscopic picture of magnetism and anisotropy in Mn-doped GaAs by resolving localized and hybridized d states using angle-dependent x-ray magnetic circular dichroism (XMCD) measurements.

208

Electronic Structure and Magnetism in Diluted Magnetic Semiconductors  

NLE Websites -- All DOE Office Websites (Extended Search)

Electronic Structure and Magnetism in Diluted Magnetic Semiconductors Print Electronic Structure and Magnetism in Diluted Magnetic Semiconductors Print The possibility of using electrons' spins in addition to their charge in information technology has created much enthusiasm for a new field of electronics popularly known as "spintronics." An intensely studied approach to obtaining spin-polarized carriers for data-storage devices is the use of diluted magnetic semiconductors created by doping ions like Mn, Fe, or Co having a net spin into a semiconducting host such as GaAs, ZnO, or GaN. The interaction among these spins leads to ferromagnetic order at low temperatures, which is necessary to create spin-polarized carriers. A research team working at ALS Beamline 4.0.2 and European Synchrotron Radiation Facility Beamline ID8 made a big leap forward in clarifying the microscopic picture of magnetism and anisotropy in Mn-doped GaAs by resolving localized and hybridized d states using angle-dependent x-ray magnetic circular dichroism (XMCD) measurements.

209

Relationship between heat transfer intensity and absolute vorticity flux intensity in flat tube bank fin channels with Vortex Generators  

Science Journals Connector (OSTI)

The heat transfer enhancement can be achieved through the secondary flow. It is found that absolute vorticity flux along the main flow can describe the secondary flow intensity and correspond to the heat transfer enhancement averaged in span wise direction. Investigations to verify this phenomenon are reported. The results show that there has a similar distribution for absolute vorticity flux in the main flow direction compared with that for span averaged Nusselt number. The conformance of Nusselt number and absolute vorticity flux shows that absolute vorticity flux can reflect the intensity of heat transfer produced by the secondary flow.

Ke-Wei Song; Liang-Bi Wang

2008-01-01T23:59:59.000Z

210

Interactions of vortices with a flexible beam with applications in fluidic energy harvesting  

SciTech Connect

A cantilever piezoelectric beam immersed in a flow and subjected to naturally occurring vortices such as those formed in the wake of bluff bodies can be used to generate electrical energy harvested in fluid flows. In this paper, we present the pressure distribution and deflection of a piezoelectric beam subjected to controlled vortices. A custom designed experimental facility is set up to study the interaction of individual and multiple vortices with the beam. Vortex tori are generated by an audio speaker and travel at controlled rates over the beam. Particle image velocimetry is used to measure the 2-D flow field induced by each vortex and estimate the effect of pressure force on the beam deflection.

Goushcha, O.; Elvin, N.; Andreopoulos, Y. [Department of Mechanical Engineering, The City College of New York, New York, New York 10031 (United States)

2014-01-13T23:59:59.000Z

211

Chaotic behavior of three interacting vortices in a confined Bose-Einstein condensate  

E-Print Network (OSTI)

Motivated by recent experimental works, we investigate a system of vortex dynamics in an atomic Bose-Einstein condensate (BEC), consisting of three vortices, two of which have the same charge. These vortices are modeled as a system of point particles which possesses a Hamiltonian structure. This tripole system constitutes a prototypical model of vortices in BECs exhibiting chaos. By using the angular momentum integral of motion we reduce the study of the system to the investigation of a two degree of freedom Hamiltonian model and acquire quantitative results about its chaotic behavior. Our investigation tool is the construction of scan maps by using the Smaller ALignment Index (SALI) as a chaos indicator. Applying this approach to a large number of initial conditions we manage to accurately and efficiently measure the extent of chaos in the model and its dependence on physically important parameters like the energy and the angular momentum of the system.

Nikos Kyriakopoulos; Vassilis Koukouloyannis; Charalampos Skokos; Panayotis Kevrekidis

2014-05-14T23:59:59.000Z

212

All Exact Solutions of Non-Abelian Vortices from Yang-Mills Instantons  

E-Print Network (OSTI)

We successfully exhaust the complete set of exact solutions of non-Abelian vortices in a quiver gauge theory, that is, the S[U(N) x U(N)] gauge theory with a bi-fudamental scalar field on a hyperbolic plane with a certain curvature, from SO(3)-invariant SU(2N) Yang-Mills instanton solutions. This work provides, for the first time, exact non-Abelian vortex solutions. We establish the ADHM construction for non-Abelian vortices and identify all the moduli parameters and the complete moduli space.

Minoru Eto; Toshiaki Fujimori; Muneto Nitta; Keisuke Ohashi

2012-07-21T23:59:59.000Z

213

Z2 electric strings and center vortices in SU(2) lattice gauge theory  

E-Print Network (OSTI)

We study the representations of SU(2) lattice gauge theory in terms of sums over the worldsheets of center vortices and Z2 electric strings, i.e. surfaces which open on the Wilson loop. It is shown that in contrast to center vortices the density of electric Z2 strings diverges in the continuum limit of the theory independently of the gauge fixing, however, their contribution to the Wilson loop yields physical string tension due to non-positivity of their statistical weight in the path integral, which is in turn related to the presence of Z2 topological monopoles in the theory.

M. I. Polikarpov; P. V. Buividovich

2008-01-01T23:59:59.000Z

214

Dispersion equation for water waves with vorticity and Stokes waves on flows with counter-currents  

E-Print Network (OSTI)

The two-dimensional free-boundary problem of steady periodic waves with vorticity is considered for water of finite depth. We investigate how flows with small-amplitude Stokes waves on the free surface bifurcate from a horizontal parallel shear flow in which counter-currents may be present. Two bifurcation mechanisms are described: for waves with fixed Bernoulli's constant and fixed wavelength. In both cases the corresponding dispersion equations serve for defining wavelengths from which Stokes waves bifurcate. Sufficient conditions guaranteeing the existence of roots of these equations are obtained. Two particular vorticity distributions are considered in order to illustrate general results.

Vladimir Kozlov; Nikolay Kuznetsov

2014-06-05T23:59:59.000Z

215

A mass, energy, vorticity, and potential enstrophy conserving lateral fluid-land boundary scheme for the shallow water equations  

Science Journals Connector (OSTI)

A numerical scheme for treating fluid-land boundaries in inviscid shallow water flows is derived that conserves the domain-summed mass, energy, vorticity, and potential enstrophy in domains with arbitrarily shaped boundaries. The boundary scheme is derived ... Keywords: Boundary conditions, Conservation, Energy, Potential enstrophy, Shallow water equations, Vorticity

G. S. Ketefian; M. Z. Jacobson

2009-01-01T23:59:59.000Z

216

Vacancy effects in an easy-plane Heisenberg model: reduction of Tc and doubly-charged vortices  

E-Print Network (OSTI)

Vacancy effects in an easy-plane Heisenberg model: reduction of Tc and doubly-charged vortices G. M here under the presence of a low concentration of nonmagnetic impurities (spin vacancies). A nearest, a large fraction of the thermally generated vortices nucleate centered on vacancies, where they have

Wysin, Gary

217

Disorder-Induced Microscopic Magnetic Memory  

NLE Websites -- All DOE Office Websites (Extended Search)

Disorder-Induced Microscopic Disorder-Induced Microscopic Magnetic Memory Disorder-Induced Microscopic Magnetic Memory Print Wednesday, 26 October 2005 00:00 The magnetic-recording industry deliberately introduces carefully controlled disorder into its materials to obtain the desired magnetic properties. But as the density of magnetic disks climbs, the size of the magnetic domains responsible for storage must decrease, posing new challenges. Beautiful theories based on random microscopic disorder have been developed over the past ten years. To directly compare these theories with precise experiments, an American-European team, led by researchers from the University of Washington, Seattle, first developed and then applied coherent x-ray speckle metrology to microscopic magnetic domains in a series of thin multilayer perpendicular magnetic materials of varying disorder. Their results, at odds with all previous theories, have set a new reference point for future theories.

218

A Novel approach to magnetic nanoparticles for the development of latent fingerprints  

Science Journals Connector (OSTI)

Abstract Majority of crime scenes do contain fingerprints as physical evidence. The uniqueness of fingerprints makes them more valuable in the court of law. As fingerprint identification is a perfect science many efforts have been made to make it more precise. The most important factor in fingerprint science is the development of prints. The traditional powder methods are routinely used all over the world. Here in this study an effort is made to develop latent fingerprints by means of magnetic nanoparticles. Magnetic nanoparticles are easy to synthesize and need no more processing. Magnetic nanoparticles carry good properties used in different fields. By using magnetic nanoparticles latent prints can be developed easily and the prints last for long in different environmental conditions. Due to this uniqueness of magnetic nanoparticles old fingerprints can also be developed. The piece of work presented here shows the affinity of magnetic nanoparticles towards the latent fingerprints.

A.K. Kavad (Ahir); Y.D. Karande

2014-01-01T23:59:59.000Z

219

Properties of vortices in the self-similar turbulent jet A. Agrawal, A.K. Prasad  

E-Print Network (OSTI)

to the fundamental importance of their flow physics. Consequently, their time-averaged velocity profiles, spread rate turbulent axisymmetric jet. The velocity fields were high-pass filtered to expose the vortical structures, the strongest eddies in the high-pass fil- tered field occur near the jet axis. The average circulation

Prasad, Ajay K.

220

The Response of Quasigeostrophic Oceanic Vortices to Tropical Cyclone Forcing BENJAMIN JAIMES AND LYNN K. SHAY  

E-Print Network (OSTI)

. Idealized oceanic currents and wind fields derived from observational data acquired during Hurricane Katrina of wind-driven acceleration of oceanic mixed layer (OML) currents rather than a function of the wind anomalies in QG vortices propagate westward with time, deforming the cold wake. Therefore, to accurately

Miami, University of

Note: This page contains sample records for the topic "magnetic vortices print" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Climatological Ertel's potential-vorticity ux and mean meridional circulation in the extratropical troposphere lower stratosphere  

E-Print Network (OSTI)

Climatological Ertel's potential-vorticity ¯ux and mean meridional circulation in the extratropical circu- lation derived for stratospheric conditions is applicable to climatological transport of the climatological meridional gradient and ¯ux of Ertel's potential vorti- city (PV). Application of Tung's ¯ux

Paris-Sud XI, Université de

222

Cassini imaging of Saturn: Southern hemisphere winds and vortices A. R. Vasavada,1  

E-Print Network (OSTI)

and October 2004 are used to create maps of cloud morphology at several wavelengths, to derive zonal windsCassini imaging of Saturn: Southern hemisphere winds and vortices A. R. Vasavada,1 S. M. Ho¨rst,1 M. Nonequatorial wind measurements display only minor differences from those collected since 1981 and reveal

Winfree, Erik

223

Vorticity Generation in the Shallow-Water Equations as Applied to Hydraulic Jumps  

Science Journals Connector (OSTI)

The authors attempt to find a bridge between the vorticity dynamics of a finite cross-stream length hydraulic jump implied by the Navier-Stokes equations and that given by the shallow-water approximation (SWA) with the turbulence of the hydraulic ...

Richard Rotunno; Piotr K. Smolarkiewicz

1995-02-01T23:59:59.000Z

224

Automated detection of coherent Lagrangian vortices in two-dimensional unsteady flows  

E-Print Network (OSTI)

Coherent boundaries of Lagrangian vortices in fluid flows have recently been identified as closed orbits of line fields associated with the Cauchy-Green strain tensor. Here we develop a fully automated procedure for the detection of such closed orbits in large-scale velocity data sets. We illustrate the power of our method on ocean surface velocities derived from satellite altimetry.

Karrasch, Daniel; Haller, George

2014-01-01T23:59:59.000Z

225

Eddy Amplitudes in Baroclinic Turbulence Driven by Nonzonal Mean Flow: Shear Dispersion of Potential Vorticity  

E-Print Network (OSTI)

of eddy energy. 1. Introduction Continental boundaries lead to a mean oceanic strati- fication with both vorticity gradient. In practical terms, this means that the oceanic available potential energy stored in east­west gradients of the pycnocline is more easily converted to eddy kinetic energy than that stored

Smith, K. Shafer

226

Vorticity and Divergence of Surface Velocities Near Shore JEROME A. SMITH  

E-Print Network (OSTI)

Vorticity and Divergence of Surface Velocities Near Shore JEROME A. SMITH Scripps Institution, and nearshore mixing-scale motions are generally undersampled (but see, e.g., Smith and Largier 1995; Johnson m 300 m on a side (Smith 2002a,b). Thus, these data focus more toward the small end of the range

Smith, Jerome A.

227

Assembly of vorticity-aligned hard-sphere colloidal strings in a simple shear flow  

Science Journals Connector (OSTI)

...fraction of particles in the strings along {theta} over the...symmetry-breaking mechanisms that lead to string formation, we experimentally...the reference frame of the oscillating shear (Fig. 3A). By comparing...Consequently, close-packed strings along the vorticity direction...

Xiang Cheng; Xinliang Xu; Stuart A. Rice; Aaron R. Dinner; Itai Cohen

2012-01-01T23:59:59.000Z

228

Stochastic Domain-Wall Depinning in Magnetic Nanowires  

NLE Websites -- All DOE Office Websites (Extended Search)

Stochastic Domain-Wall Depinning in Magnetic Nanowires Print Stochastic Domain-Wall Depinning in Magnetic Nanowires Print Reliably controlling the motion of magnetic domain walls along magnetic nanowires is a key requirement for current technological development of novel classes of logic and storage devices, but understanding the nature of non-deterministic domain-wall motion remains a scientific challenge. A statistical analysis of high-resolution magnetic soft x-ray microscopy images by a Berkeley Lab-University of Hamburg group has now revealed that the stochastic behavior of the domain-wall depinning field in notch-patterned Ni80Fe20 (permalloy) nanowires depends strongly on the wire width and the notch depth. This result both provides valuable insight into the motion of magnetic-domain walls and opens a path to further technological developments in spintronics applications.

229

Stochastic Domain-Wall Depinning in Magnetic Nanowires  

NLE Websites -- All DOE Office Websites (Extended Search)

Stochastic Domain-Wall Depinning in Magnetic Nanowires Print Stochastic Domain-Wall Depinning in Magnetic Nanowires Print Reliably controlling the motion of magnetic domain walls along magnetic nanowires is a key requirement for current technological development of novel classes of logic and storage devices, but understanding the nature of non-deterministic domain-wall motion remains a scientific challenge. A statistical analysis of high-resolution magnetic soft x-ray microscopy images by a Berkeley Lab-University of Hamburg group has now revealed that the stochastic behavior of the domain-wall depinning field in notch-patterned Ni80Fe20 (permalloy) nanowires depends strongly on the wire width and the notch depth. This result both provides valuable insight into the motion of magnetic-domain walls and opens a path to further technological developments in spintronics applications.

230

Stochastic Domain-Wall Depinning in Magnetic Nanowires  

NLE Websites -- All DOE Office Websites (Extended Search)

Stochastic Domain-Wall Depinning in Magnetic Nanowires Print Stochastic Domain-Wall Depinning in Magnetic Nanowires Print Reliably controlling the motion of magnetic domain walls along magnetic nanowires is a key requirement for current technological development of novel classes of logic and storage devices, but understanding the nature of non-deterministic domain-wall motion remains a scientific challenge. A statistical analysis of high-resolution magnetic soft x-ray microscopy images by a Berkeley Lab-University of Hamburg group has now revealed that the stochastic behavior of the domain-wall depinning field in notch-patterned Ni80Fe20 (permalloy) nanowires depends strongly on the wire width and the notch depth. This result both provides valuable insight into the motion of magnetic-domain walls and opens a path to further technological developments in spintronics applications.

231

Stochastic Domain-Wall Depinning in Magnetic Nanowires  

NLE Websites -- All DOE Office Websites (Extended Search)

Stochastic Domain-Wall Depinning in Magnetic Nanowires Print Stochastic Domain-Wall Depinning in Magnetic Nanowires Print Reliably controlling the motion of magnetic domain walls along magnetic nanowires is a key requirement for current technological development of novel classes of logic and storage devices, but understanding the nature of non-deterministic domain-wall motion remains a scientific challenge. A statistical analysis of high-resolution magnetic soft x-ray microscopy images by a Berkeley Lab-University of Hamburg group has now revealed that the stochastic behavior of the domain-wall depinning field in notch-patterned Ni80Fe20 (permalloy) nanowires depends strongly on the wire width and the notch depth. This result both provides valuable insight into the motion of magnetic-domain walls and opens a path to further technological developments in spintronics applications.

232

Stochastic Domain-Wall Depinning in Magnetic Nanowires  

NLE Websites -- All DOE Office Websites (Extended Search)

Stochastic Domain-Wall Depinning in Magnetic Nanowires Print Stochastic Domain-Wall Depinning in Magnetic Nanowires Print Reliably controlling the motion of magnetic domain walls along magnetic nanowires is a key requirement for current technological development of novel classes of logic and storage devices, but understanding the nature of non-deterministic domain-wall motion remains a scientific challenge. A statistical analysis of high-resolution magnetic soft x-ray microscopy images by a Berkeley Lab-University of Hamburg group has now revealed that the stochastic behavior of the domain-wall depinning field in notch-patterned Ni80Fe20 (permalloy) nanowires depends strongly on the wire width and the notch depth. This result both provides valuable insight into the motion of magnetic-domain walls and opens a path to further technological developments in spintronics applications.

233

Mon. Not. R. Astron. Soc. 000, 000--000 (0000) Printed 7 June 2001 (MN L A T E X style file v2.2) The magnetic field and wind confinement of fi Cephei  

E-Print Network (OSTI)

.2) The magnetic field and wind confinement of fi Cephei: new clues for interpreting the Be phenomenon? J of the large scale magnetic field and of the associated magnetically confined wind and cir­ cumstellar of 26000 K and age of 12 Myr, viewed with an inclination of the rotation axis of about 60 ffi . Using two

Donati, Jean-François

234

Content-adaptive lenticular prints  

E-Print Network (OSTI)

Lenticular prints are a popular medium for producing automultiscopic glasses-free 3D images. The light field emitted by such prints has a fixed spatial and angular resolution. We increase both perceived angular and spatial ...

Tompkin, James

235

residual magnetism  

Science Journals Connector (OSTI)

The magnetization, i.e., the magnetic polarization, that remains in a magnetized material after all attempts to remove the magnetization have been made. Note: An example of residual magnetization is the magnetiza...

2001-01-01T23:59:59.000Z

236

Organic vapor jet printing system  

SciTech Connect

An organic vapor jet printing system includes a pump for increasing the pressure of an organic flux.

Forrest, Stephen R

2012-10-23T23:59:59.000Z

237

Large Magnetization at Carbon Surfaces  

NLE Websites -- All DOE Office Websites (Extended Search)

Large Magnetization at Carbon Large Magnetization at Carbon Surfaces Large Magnetization at Carbon Surfaces Print Wednesday, 31 August 2011 00:00 From organic matter to pencil lead, carbon is a versatile element. Now, another use has been found: magnets. One would not expect pure carbon to be magnetic, but for more than ten years scientists have suspected that carbon can be made to be magnetic by doping it with nonmagnetic materials, changing its order ever so slightly. Years ago, the first x-ray images obtained using the scanning transmission x-ray microscope at ALS Beamline 11.0.2 provided valuable insight into how proton irradiation can cause carbon to transform into a ferromagnetic material. Now, researchers are using x-ray spectroscopy at ALS Beamline 4.0.2 to study the magnetism of proton-irradiated graphite surfaces in order to understand the effects of hydrogen (i.e. protons) on the electronic structure of carbon. In studying the properties of electrons responsible for magnetic order in graphite, researchers found that a very large magnetic moment is essentially switched on when hydrogen atoms are incorporated at the surface of graphite.

238

Monolithically integrated Helmholtz coils by 3-dimensional printing  

SciTech Connect

3D printing technology is of great interest for the monolithic fabrication of integrated systems; however, it is a challenge to introduce metallic components into 3D printed molds to enable broader device functionality. Here, we develop a technique for constructing a multi-axial Helmholtz coil by injecting a eutectic liquid metal Gallium Indium alloy (EGaIn) into helically shaped orthogonal cavities constructed in a 3D printed block. The tri-axial solenoids each carry up to 3.6?A of electrical current and produce magnetic field up to 70?G. Within the central section of the coil, the field variation is less than 1% and is in agreement with theory. The flow rates and critical pressures required to fill the 3D cavities with liquid metal also agree with theoretical predictions and provide scaling trends for filling the 3D printed parts. These monolithically integrated solenoids may find future applications in electronic cell culture platforms, atomic traps, and miniaturized chemical analysis systems based on nuclear magnetic resonance.

Li, Longguang [Department of Electrical Engineering, University of Michigan–Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University, Shanghai 200240 (China); Abedini-Nassab, Roozbeh; Yellen, Benjamin B., E-mail: yellen@duke.edu [Department of Electrical Engineering, University of Michigan–Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University, Shanghai 200240 (China); Department of Mechanical Engineering and Materials Science, Duke University, P.O. Box 90300, Hudson Hall, Durham, North Carolina 27708 (United States)

2014-06-23T23:59:59.000Z

239

3D Printed Bionic Ears  

Science Journals Connector (OSTI)

(bottom) a 3D printer used for the printing process. ... Figure 2A shows the 3D printed bionic ear immediately after printing. ... A student version of the Autodesk 3ds Max software package was used to modify and render the 3D images. ...

Manu S. Mannoor; Ziwen Jiang; Teena James; Yong Lin Kong; Karen A. Malatesta; Winston O. Soboyejo; Naveen Verma; David H. Gracias; Michael C. McAlpine

2013-05-01T23:59:59.000Z

240

Part removal of 3D printed parts  

E-Print Network (OSTI)

An experimental study was performed to understand the correlation between printing parameters in the FDM 3D printing process, and the force required to remove a part from the build platform of a 3D printing using a patent ...

Peña Doll, Mateo

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "magnetic vortices print" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Results of familiarization of and prospects for a procedure for the burning of wastes in a vortical fluidized bed  

Science Journals Connector (OSTI)

Problems that have arisen during tune-up of the production line for the thermal processing of solid household waste by the method of burning in a vortical fluidized bed (principally,...

A. N. Tugov; G. A. Ryabov; V. I. Rodionov…

2006-09-01T23:59:59.000Z

242

Disentangling the Forcing Mechanisms of a Heavy Precipitation Event along the Alpine South Side Using Potential Vorticity Inversion  

Science Journals Connector (OSTI)

Extreme precipitation events along the Alpine south side (AS) are often forced by upper-level positive potential vorticity (PV) anomalies over western Europe. These so-called PV streamers go along with a dynamical forcing for upward motion, a ...

Linda Schlemmer; Olivia Martius; Michael Sprenger; Cornelia Schwierz; Arwen Twitchett

2010-06-01T23:59:59.000Z

243

Stability of Half-Quantum Vortices in px+ipy Superconductors  

Science Journals Connector (OSTI)

We consider the stability conditions for half-quantum vortices in a quasi-two-dimensional px+ipy superconductor (such as Sr2RuO4 is believed to be). The predicted exotic nature of these excitations has recently attracted much attention, but they have not been observed yet. We emphasize that an isolated half-quantum vortex has a divergent energy cost in the bulk due to its unscreened spin current, which requires two half-quantum vortices with opposite spin winding to pair. We show that the stability of such a pair is enhanced when the ratio of spin superfluid density to superfluid density ?sp/?s is small. We propose using various mesoscopic geometries to stabilize and observe these exotic excitations.

Suk Bum Chung; Hendrik Bluhm; Eun-Ah Kim

2007-11-09T23:59:59.000Z

244

Color Magnetic Flux Tubes in Dense QCD  

E-Print Network (OSTI)

QCD is expected to be in the color-flavor locking phase in high baryon density, which exhibits color superconductivity. The most fundamental topological objects in the color superconductor are non-Abelian vortices which are topologically stable color magnetic flux tubes. We present numerical solutions of the color magnetic flux tube for diverse choices of the coupling constants. We also analytically study its asymptotic profiles and find that they are different from the case of usual superconductors. We propose the width of color magnetic fluxes and find that it is larger than naive expectation of the Compton wave length of the massive gluon when the gluon mass is larger than the scalar mass.

Minoru Eto; Muneto Nitta

2009-07-07T23:59:59.000Z

245

Color magnetic flux tubes in dense QCD  

SciTech Connect

QCD is expected to be in the color-flavor locking phase in high baryon density, which exhibits color superconductivity. The most fundamental topological objects in the color superconductor are non-Abelian vortices which are topologically stable color magnetic flux tubes. We present numerical solutions of the color magnetic flux tube for diverse choices of the coupling constants based on the Ginzburg-Landau Lagrangian. We also analytically study its asymptotic profiles and find that they are different from the case of usual superconductors. We propose the width of color magnetic fluxes and find that it is larger than naive expectation of the Compton wavelength of the massive gluon when the gluon mass is larger than the scalar mass.

Eto, Minoru [Theoretical Physics Laboratory, RIKEN, Saitama 351-0198 (Japan); Nitta, Muneto [Department of Physics, and Research and Education Center for Natural Sciences, Keio University, 4-1-1 Hiyoshi, Yokohama, Kanagawa 223-8521 (Japan)

2009-12-15T23:59:59.000Z

246

Energy conversion in ferrofluids:?Magnetic nanoparticles as motors or generators  

Science Journals Connector (OSTI)

We submit a CoFe2O4 ferrofluid in rigid rotation (and then in a Couette flow) to an alternating magnetic field. Rotational viscosity and transverse magnetization are measured simultaneously. Depending on the relative values of fluid vorticity and field frequency, the magnetic particles behave as nanomotors or nanogenerators. It demonstrates the energy conversion between the magnetic and kinetic degrees of freedom of the particles. The effect of an hydrodynamic shear on the spectrum of relaxation times evidences an intimate structure of the ferrofluid consisting of small chains of dipoles.

F. Gazeau; C. Baravian; J.-C. Bacri; R. Perzynski; M. I. Shliomis

1997-07-01T23:59:59.000Z

247

An Investigation of ink usage in offset process printing.  

E-Print Network (OSTI)

??With the trend of sustainable printing in the print industry, reducing ink usage is considered a win-win solution for printers who are seeking sustainable printing… (more)

Zhou, Jiayi

2012-01-01T23:59:59.000Z

248

An experimental investigation of leading edge vortical flow about a delta wing during wing rock  

E-Print Network (OSTI)

tunnel and water tunnel tests. The hysteresis in the C, versus y, during water tunnel testing, traveled in the opposite direction of the wind tunnel results. Visualization of the water tunnel vortical flowfields provided quantified right and left vortex... locations at specific roll angles during wing rock. The contribution to the rolling moment based on these vortex positions was analyzed. The results show a decrease in rolling moment before reaching the maximum roll amplitude and an increase in rolling...

Nelson, Michael Denis

2012-06-07T23:59:59.000Z

249

Two Species of Vortices in a massive Gauged Non-linear Sigma Model  

E-Print Network (OSTI)

A non-linear sigma model with scalar fields taking values on the sphere is described by means of stereographic maps. When the U(1) symmetry is gauged and mass terms are allowed, the model accommodates stable self-dual vortices of two kinds with different energies per unit of length and where the Higgs field winds at the cores around the two opposite poles of the sphere.

Alonso-Izquierdo, Alberto; Guilarte, Juan Mateos

2014-01-01T23:59:59.000Z

250

Lensless Imaging of Magnetic Nanostructures  

NLE Websites -- All DOE Office Websites (Extended Search)

Lensless Imaging of Magnetic Nanostructures Print Lensless Imaging of Magnetic Nanostructures Print Magnetism is useful for many devices and techniques, from electric motors and computer hard drives to magnetic resonance imaging used in medicine. By studying the basics of magnetism, scientists aim to better understand the fundamental physical principles that govern magnetic systems, perhaps leading to important new technologies. The high brightness and coherence of the ALS's soft x-rays have enabled scientists to apply lensless x-ray imaging for the first time to nanometer-scale magnetic structures in an alloy. Many Ways To See You open your eyes and detect the light rays streaming through your bedroom window (transmission), illuminating your socks on the floor (scattering). You put on your glasses (refraction) to detect the state of your image in the mirror (reflection). If you are an ALS scientist, perhaps you go to work and shine some x-ray light on a crystal to detect the arrangement of the atoms in the crystal (diffraction). Now, thanks to Turner et al., you can also shine some x-ray light on a magnetic sample to detect the arrangement of its electron spins through a method known as lensless imaging. This last example is an equally valid way to "see," but instead of using windows, lenses, or mirrors to manipulate light and construct an image, mathematical formulas are used to describe the effects that particles and fields in the sample have on the light. These formulas have always contained terms that relate to the electron spin of magnetic atoms, but they were previously ignored. Using the full formula allows for the determination of not only crystal structure, but magnetic spin distribution and orientation as well, with a spatial resolution limited only by the wavelength of x-rays used. This promising method can be used at any coherent light source, including modern x-ray free-electron lasers, where ultrashort pulses would freeze-frame magnetic changes, offering the potential for imaging in unprecedented detail the structure and motion of boundaries between regions with different magnetic orientation.

251

Lensless Imaging of Magnetic Nanostructures  

NLE Websites -- All DOE Office Websites (Extended Search)

Lensless Imaging of Magnetic Nanostructures Print Lensless Imaging of Magnetic Nanostructures Print Magnetism is useful for many devices and techniques, from electric motors and computer hard drives to magnetic resonance imaging used in medicine. By studying the basics of magnetism, scientists aim to better understand the fundamental physical principles that govern magnetic systems, perhaps leading to important new technologies. The high brightness and coherence of the ALS's soft x-rays have enabled scientists to apply lensless x-ray imaging for the first time to nanometer-scale magnetic structures in an alloy. Many Ways To See You open your eyes and detect the light rays streaming through your bedroom window (transmission), illuminating your socks on the floor (scattering). You put on your glasses (refraction) to detect the state of your image in the mirror (reflection). If you are an ALS scientist, perhaps you go to work and shine some x-ray light on a crystal to detect the arrangement of the atoms in the crystal (diffraction). Now, thanks to Turner et al., you can also shine some x-ray light on a magnetic sample to detect the arrangement of its electron spins through a method known as lensless imaging. This last example is an equally valid way to "see," but instead of using windows, lenses, or mirrors to manipulate light and construct an image, mathematical formulas are used to describe the effects that particles and fields in the sample have on the light. These formulas have always contained terms that relate to the electron spin of magnetic atoms, but they were previously ignored. Using the full formula allows for the determination of not only crystal structure, but magnetic spin distribution and orientation as well, with a spatial resolution limited only by the wavelength of x-rays used. This promising method can be used at any coherent light source, including modern x-ray free-electron lasers, where ultrashort pulses would freeze-frame magnetic changes, offering the potential for imaging in unprecedented detail the structure and motion of boundaries between regions with different magnetic orientation.

252

Lensless Imaging of Magnetic Nanostructures  

NLE Websites -- All DOE Office Websites (Extended Search)

Lensless Imaging of Magnetic Nanostructures Print Lensless Imaging of Magnetic Nanostructures Print Magnetism is useful for many devices and techniques, from electric motors and computer hard drives to magnetic resonance imaging used in medicine. By studying the basics of magnetism, scientists aim to better understand the fundamental physical principles that govern magnetic systems, perhaps leading to important new technologies. The high brightness and coherence of the ALS's soft x-rays have enabled scientists to apply lensless x-ray imaging for the first time to nanometer-scale magnetic structures in an alloy. Many Ways To See You open your eyes and detect the light rays streaming through your bedroom window (transmission), illuminating your socks on the floor (scattering). You put on your glasses (refraction) to detect the state of your image in the mirror (reflection). If you are an ALS scientist, perhaps you go to work and shine some x-ray light on a crystal to detect the arrangement of the atoms in the crystal (diffraction). Now, thanks to Turner et al., you can also shine some x-ray light on a magnetic sample to detect the arrangement of its electron spins through a method known as lensless imaging. This last example is an equally valid way to "see," but instead of using windows, lenses, or mirrors to manipulate light and construct an image, mathematical formulas are used to describe the effects that particles and fields in the sample have on the light. These formulas have always contained terms that relate to the electron spin of magnetic atoms, but they were previously ignored. Using the full formula allows for the determination of not only crystal structure, but magnetic spin distribution and orientation as well, with a spatial resolution limited only by the wavelength of x-rays used. This promising method can be used at any coherent light source, including modern x-ray free-electron lasers, where ultrashort pulses would freeze-frame magnetic changes, offering the potential for imaging in unprecedented detail the structure and motion of boundaries between regions with different magnetic orientation.

253

Lensless Imaging of Magnetic Nanostructures  

NLE Websites -- All DOE Office Websites (Extended Search)

Lensless Imaging of Magnetic Nanostructures Print Lensless Imaging of Magnetic Nanostructures Print Magnetism is useful for many devices and techniques, from electric motors and computer hard drives to magnetic resonance imaging used in medicine. By studying the basics of magnetism, scientists aim to better understand the fundamental physical principles that govern magnetic systems, perhaps leading to important new technologies. The high brightness and coherence of the ALS's soft x-rays have enabled scientists to apply lensless x-ray imaging for the first time to nanometer-scale magnetic structures in an alloy. Many Ways To See You open your eyes and detect the light rays streaming through your bedroom window (transmission), illuminating your socks on the floor (scattering). You put on your glasses (refraction) to detect the state of your image in the mirror (reflection). If you are an ALS scientist, perhaps you go to work and shine some x-ray light on a crystal to detect the arrangement of the atoms in the crystal (diffraction). Now, thanks to Turner et al., you can also shine some x-ray light on a magnetic sample to detect the arrangement of its electron spins through a method known as lensless imaging. This last example is an equally valid way to "see," but instead of using windows, lenses, or mirrors to manipulate light and construct an image, mathematical formulas are used to describe the effects that particles and fields in the sample have on the light. These formulas have always contained terms that relate to the electron spin of magnetic atoms, but they were previously ignored. Using the full formula allows for the determination of not only crystal structure, but magnetic spin distribution and orientation as well, with a spatial resolution limited only by the wavelength of x-rays used. This promising method can be used at any coherent light source, including modern x-ray free-electron lasers, where ultrashort pulses would freeze-frame magnetic changes, offering the potential for imaging in unprecedented detail the structure and motion of boundaries between regions with different magnetic orientation.

254

Electronic Structure and Magnetism in Diluted Magnetic Semiconductors  

NLE Websites -- All DOE Office Websites (Extended Search)

Electronic Structure and Electronic Structure and Magnetism in Diluted Magnetic Semiconductors Electronic Structure and Magnetism in Diluted Magnetic Semiconductors Print Wednesday, 29 November 2006 00:00 The possibility of using electrons' spins in addition to their charge in information technology has created much enthusiasm for a new field of electronics popularly known as "spintronics." An intensely studied approach to obtaining spin-polarized carriers for data-storage devices is the use of diluted magnetic semiconductors created by doping ions like Mn, Fe, or Co having a net spin into a semiconducting host such as GaAs, ZnO, or GaN. The interaction among these spins leads to ferromagnetic order at low temperatures, which is necessary to create spin-polarized carriers. A research team working at ALS Beamline 4.0.2 and European Synchrotron Radiation Facility Beamline ID8 made a big leap forward in clarifying the microscopic picture of magnetism and anisotropy in Mn-doped GaAs by resolving localized and hybridized d states using angle-dependent x-ray magnetic circular dichroism (XMCD) measurements.

255

TURBULENT AMPLIFICATION OF A MAGNETIC FIELD DRIVEN BY THE DYNAMO EFFECT AT RIPPLED SHOCKS  

SciTech Connect

We analytically derive the vorticity generated downstream of a two-dimensional (2D) rippled hydromagnetic shock neglecting fluid viscosity and resistivity. The growth of the turbulent component of the downstream magnetic field is driven by the motion of vortical eddies. We determine an analytic time evolution of the magnetic field amplification at shocks, so far described only numerically, until saturation occurs due to seed-field reaction to the whirling of field lines. The explicit expression of the amplification growth rate and of the nonlinear field back-reaction in terms of the parameters of shock and interstellar density fluctuation is derived from MHD jump conditions at rippled shocks. A magnetic field saturation up to the order of milli-Gauss and a short-term variability in the X-ray observations of supernova remnants can be obtained by using reasonable parameters for the interstellar turbulence.

Fraschetti, F. [Associated Member of LUTh, Observatoire de Paris, CNRS-UMR8102 and Universite Paris VII, 5 Place Jules Janssen, F-92195 Meudon Cedex, France. (France)

2013-06-20T23:59:59.000Z

256

Magnetic Vortex Core Reversal by Low-Field Excitations  

NLE Websites -- All DOE Office Websites (Extended Search)

Magnetic Vortex Core Reversal by Low-Field Excitations Print Magnetic Vortex Core Reversal by Low-Field Excitations Print In micrometer-sized magnetic thin films, the magnetization typically adopts an in-plane, circular configuration known as a magnetic vortex. At the vortex core, the magnetization turns sharply out of the plane, pointing either up or down. Magnetic data storage based on this binary phenomenon is an intriguing concept, but it would require the ability to flip the vortex cores on demand. Because these structures are highly stable, very strong magnetic fields of around half a tesla (approximately one-third the field of the strongest permanent magnet) were previously thought to be necessary to accomplish this. At the ALS, a team of researchers from Germany, Belgium, and the U.S. has used time-resolved scanning transmission x-ray microscopy (STXM) to observe vortex motion and demonstrate the feasibility of using weak magnetic fields as low as 1.5 millitesla (mT) to reverse the direction of a vortex core. The observed switching mechanism, which can be understood within the framework of micromagnetic theory, gives insights into basic magnetization dynamics and their possible application to data storage technologies.

257

Magnetic Vortex Core Reversal by Low-Field Excitations  

NLE Websites -- All DOE Office Websites (Extended Search)

Magnetic Vortex Core Reversal by Low-Field Excitations Print Magnetic Vortex Core Reversal by Low-Field Excitations Print In micrometer-sized magnetic thin films, the magnetization typically adopts an in-plane, circular configuration known as a magnetic vortex. At the vortex core, the magnetization turns sharply out of the plane, pointing either up or down. Magnetic data storage based on this binary phenomenon is an intriguing concept, but it would require the ability to flip the vortex cores on demand. Because these structures are highly stable, very strong magnetic fields of around half a tesla (approximately one-third the field of the strongest permanent magnet) were previously thought to be necessary to accomplish this. At the ALS, a team of researchers from Germany, Belgium, and the U.S. has used time-resolved scanning transmission x-ray microscopy (STXM) to observe vortex motion and demonstrate the feasibility of using weak magnetic fields as low as 1.5 millitesla (mT) to reverse the direction of a vortex core. The observed switching mechanism, which can be understood within the framework of micromagnetic theory, gives insights into basic magnetization dynamics and their possible application to data storage technologies.

258

Magnetic Vortex Core Reversal by Low-Field Excitations  

NLE Websites -- All DOE Office Websites (Extended Search)

Magnetic Vortex Core Reversal by Low-Field Excitations Print Magnetic Vortex Core Reversal by Low-Field Excitations Print In micrometer-sized magnetic thin films, the magnetization typically adopts an in-plane, circular configuration known as a magnetic vortex. At the vortex core, the magnetization turns sharply out of the plane, pointing either up or down. Magnetic data storage based on this binary phenomenon is an intriguing concept, but it would require the ability to flip the vortex cores on demand. Because these structures are highly stable, very strong magnetic fields of around half a tesla (approximately one-third the field of the strongest permanent magnet) were previously thought to be necessary to accomplish this. At the ALS, a team of researchers from Germany, Belgium, and the U.S. has used time-resolved scanning transmission x-ray microscopy (STXM) to observe vortex motion and demonstrate the feasibility of using weak magnetic fields as low as 1.5 millitesla (mT) to reverse the direction of a vortex core. The observed switching mechanism, which can be understood within the framework of micromagnetic theory, gives insights into basic magnetization dynamics and their possible application to data storage technologies.

259

Fabrication and Characterization of Nano-Sized Magnetic Structures and Their Flux-Pinning Effects on Superconducting Thin Films  

E-Print Network (OSTI)

Energy Dissipation due to Vortex Motion .................................. 7 Vortex Pinning in the Ferromagnet-Superconductor Hybrid (FSH) . 9 II FABRICATION OF EMBEDDED FERROMAGNET..., as the external magnetic field increases above the lower critical field and below an upper critical field ??2 (?), the magnetic flux partially penetrates the sample in the form of tubes, or vortices (Fig.4). This state is said to be a vortex state or mixed...

Lee, Han Gil

2011-02-22T23:59:59.000Z

260

3D Printing Prof. Hank Dietz  

E-Print Network (OSTI)

3D Printing Prof. Hank Dietz TCMS, March 14, 2014 University of Kentucky Electrical & Computer #12;3D With Glue Layers of paper: printed with glue & cut Layers of powder: printed with glue Can also be printed in full color #12;3D Extrusion (RepRaps) FDM: Fused Deposition Modeling FFF: Fused

Dietz, Henry G. "Hank"

Note: This page contains sample records for the topic "magnetic vortices print" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Hidden Rotational Symmetries in Magnetic Domain Patterns  

NLE Websites -- All DOE Office Websites (Extended Search)

Hidden Rotational Symmetries in Hidden Rotational Symmetries in Magnetic Domain Patterns Hidden Rotational Symmetries in Magnetic Domain Patterns Print Wednesday, 27 June 2012 00:00 Magnetic thin films have complicated domain patterns that may or may not repeat with each cycle through a hysteresis loop. A magnetic thin film with perpendicular anisotropy, such as that used in computer hard drives, for example, commonly exhibits labyrinthine domain patterns. These patterns are disordered over a macroscopic length scale, and intuitively we do not expect to observe any symmetry in such systems. Scientists at the ALS, the University of Oregon, and the University of California, San Diego, have recently used coherent soft x-ray scattering with angular Fourier analysis to discover that the disordered domain patterns do, in fact, exhibit rotational symmetries, which can be as small as two-fold or as large as 30-fold. Their study of magnetic symmetries gives scientists a toolbox for discovering hidden symmetries in diverse material systems.

262

Magnetic Spinner  

Science Journals Connector (OSTI)

A science toy sometimes called the “magnetic spinner” is an interesting class demonstration to illustrate the principles of magnetic levitation. It can also be used to demonstrate Faraday's law and a horizontally suspended physical pendulum. The levitated part contains two circular magnets encased in a plastic housing. Each magnet stays above two triangular magnets fixed to the base. The magnetic repulsive force experienced by the circular magnets is independent of their orientation; therefore the holder of these magnets can be rotated without affecting its stability. The holder with the circular magnets can be oscillated up and down as a horizontally suspended physical pendulum.

P. J. Ouseph

2006-01-01T23:59:59.000Z

263

Magnetism Digest  

Science Journals Connector (OSTI)

... and Institute of Electrical and Electronic Engineers, on the occasion of their annual conferences on magnetism and magnetic materials in the United States, have sponsored the production of a Magnetic ... references, drawn from a large number of sources, to work in the field of magnetism and magnetic materials published in the preceding year. They therefore provide a very convenient ...

J. H. PHILLIPS

1966-06-25T23:59:59.000Z

264

Poster Printing Creating poster  

E-Print Network (OSTI)

Poster Printing Creating poster Poster size: As a first step in creating poster file in any of your slide in Page Setup, by selecting `Slides user for: Custom' option. Poster background: Posters). Posters with dark backgrounds (i.e. black, blue, maroon) will incur charges, as they use too much ink

Connor, Ed

265

E-Print Network 3.0 - antenna array printed Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

Fabrication Printed antennas are fabricated and tested... on site. This includes simple patch antennas and complex wideband elements and arrays. Other types... A number of printed...

266

Fusion rules and vortices in $p_x+ip_y$ superconductors  

E-Print Network (OSTI)

The "half-quantum" vortices ($\\sigma$) and quasiparticles ($\\psi$) in a two-dimensional $p_x+ip_y$ superconductor obey the Ising-like fusion rules $\\psi\\times \\psi=1$, $\\sigma\\times \\psi=\\sigma$, and $\\sigma\\times \\sigma= 1+\\psi$. We explain how the physical fusion of vortex-antivortex pairs allows us to use these rules to read out the information encoded in the topologically protected space of degenerate ground states. We comment on the potential applicability of this fact to quantum computation. Modified 11/30/05 to reflect manuscript as accepted for publication. Includes corrected last section.

Michael Stone; Suk Bum Chung

2005-05-20T23:59:59.000Z

267

Effects of Magnetic Field on the Turbulent Wake of a Cylinder in MHD Channel Flow  

SciTech Connect

Results from a free-surface MHD flow experiment are presented detailing the modi cation of vortices in the wake of a circular cylinder with its axis parallel to the applied magnetic fi eld. Experiments were performed with a Reynolds number near Re ~ 104 as the interaction parameter, N = |j x#2; B| / |? (? ? ?), was increased through unity. By concurrently sampling the downstream fluid velocity at sixteen cross-stream locations in the wake, it was possible to extract an ensemble of azimuthal velocity profi les as a function of radius for vortices shed by the cylinder at varying strengths of magnetic field. Results indicate a signi cant change in vortex radius and rotation as N is increased. The lack of deviations from the vortex velocity pro file at high magnetic fi elds suggests the absence of small-scale turbulent features. By sampling the wake at three locations downstream in subsequent experiments, the decay of the vortices was examined and the effective viscosity was found to decrease as N-049±0.4. This reduction in effective viscosity is due to the modi cation of the small-scale eddies by the magnetic fi eld. The slope of the energy spectrum was observed to change from a k-1.8 power-law at low N to a k-3.5 power-law for N > 1. Together, these results suggest the flow smoothly transitioned to a quasi-two-dimensional state in the range 0 < N < 1.

John Rhoads, Eric Edlund and Hantao Ji

2013-04-17T23:59:59.000Z

268

Block-Cell-Printing for live single-cell printing  

Science Journals Connector (OSTI)

...Design and Operation of BloC-Printing. In a typical BloC-Printing process, the BloC-Mold, designed using AutoCAD (Autodesk) and fabricated by photolithography and polydimethylsiloxane (PDMS) molding techniques, was laid onto a Petri dish, glass...

Kai Zhang; Chao-Kai Chou; Xiaofeng Xia; Mien-Chie Hung; Lidong Qin

2014-01-01T23:59:59.000Z

269

DESIGNING AND PRINTING POSTERS AT  

E-Print Network (OSTI)

DESIGNING AND PRINTING POSTERS AT GIOS INFORMATICS LAB Cindy D. Zisner Technology Support Analyst #12; Today, posters are much easier to create and print with the use of computers and large It is advisable to set your page size before actually placing items on your poster, so items don't shift after you

Hall, Sharon J.

270

Mon. Not. R. Astron. Soc. 000, 000000 (0000) Printed 1 April 2005 (MN LATEX style file v2.2) The radial distribution of magnetic helicity in the solar  

E-Print Network (OSTI)

.2) The radial distribution of magnetic helicity in the solar convective zone: observations and dynamo theory H We continue our attempt to connect observational data on current helicity in solar active regions with solar dynamo models. In addition to our previous results about temporal and latitudinal distributions

271

The nucleation of vortices in superfluid [sup 4]He: Answers and questions  

SciTech Connect

The velocity threshold for phase slips, v[sub c], has been measured in ultra-pure [sup 4]He and ultra-dilute [sup 3]He-[sup 4]He mixtures, down to a temperature of 15 mK. These experiments have revealed a crossover from a temperature-dependent regime above [approximately]150 mK to a plateau of v[sub c] below in ultra-pure [sup 4]He. Concentrations of [sup 3]He impurities as low as a few parts in 10[sup [minus]9] greatly affect the plateau regime, causing v[sub c] to decrease markedly at low temperature. These observations are interpreted in the framework of the nucleation, either thermally activated or by quantum tunnelling, of vortices in the appropriate shape of half-rings. These vortices form on wall asperities at local velocities u[sub s] estimated to be [approximately]22 m/s in these experiments. The half-ring model is shown to yield a critical velocity of the same magnitude but leaves many basic questions unanswered.

Avenel, O.; Ihas G.G. (Centre d'Etudes de Saclay (France)); Varoquaux, E. (Universite Paris-Sud, Orsay (France))

1993-12-01T23:59:59.000Z

272

Moving vortex phases, dynamical symmetry breaking, and jamming for vortices in honeycomb pinning arrays  

SciTech Connect

We show using numerical simulations that vortices in honeycomb pinning arrays can exhibit a remarkable variety of dynamical phases that are distinct from those found for triangular and square pinning arrays. In the honeycomb arrays, it is possible for the interstitial vortices to form dimer or higher n-mer states which have an additional orientational degree of freedom that can lead to the formation of vortex molecular crystals. For filling fractions where dimer states appear, a dynamical symmetry breaking can occur when the dimers flow in one of two possible alignment directions. This leads to transport in the direction transverse to the applied drive. We show that dimerization produces distinct types of moving phases which depend on the direction of the driving force with respect to the pinning lattice symmetry. When the dimers are driven along certain directions, a reorientation of the dimers can produce a jamming phenomenon which results in a strong enhancement in the critical depinning force. The jamming can also cause unusual effects such as an increase in the critical depinning force when the size of the pinning sites is reduced.

Reichhardt, Charles [Los Alamos National Laboratory; Reichhardt, Cynthia [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

273

Dynamics of Three Non-co-rotating Vortices in Bose-Einstein Condensates  

E-Print Network (OSTI)

In this work we use standard Hamiltonian-system techniques in order to study the dynamics of three vortices with alternating charges in a confined Bose-Einstein condensate. In addition to being motivated by recent experiments, this system offers a natural vehicle for the exploration of the transition of the vortex dynamics from ordered to progressively chaotic behavior. In particular, it possesses two integrals of motion, the {\\it energy} (which is expressed through the Hamiltonian $H$) and the {\\it angular momentum} $L$ of the system. By using the integral of the angular momentum, we reduce the system to a two degree-of-freedom one with $L$ as a parameter and reveal the topology of the phase space through the method of Poincar\\'e surfaces of section. We categorize the various motions that appear in the different regions of the sections and we study the major bifurcations that occur to the families of periodic motions of the system. Finally, we correspond the orbits on the surfaces of section to the real space motion of the vortices in the plane.

Vassilis Koukouloyannis; George Voyatzis; Panayotis G. Kevrekidis

2014-04-27T23:59:59.000Z

274

One-Dimensional String Theory with Vortices as Upside-Down Matrix Oscillator  

E-Print Network (OSTI)

We study matrix quantum mechanics at a finite temperature equivalent to one dimensional compactified string theory with vortex (winding) excitations. It is explicitly demonstrated that the states transforming under non-trivial U(N) representations describe various configurations vortices and anti-vortices. For example, for the adjoint representation the Feynman graphs (representing discretized world-sheets) contain two faces with the boundaries wrapping around the compactified target space which is equivalent to a vortex-anti-vortex pair. A technique is developed to calculate partition functions in a given representation for the standard matrix oscillator. It enables us to obtain the partition function in the presence of a vortex-anti-vortex pair in the double scaling limit using an analytical continuation to the upside-down oscillator. The Berezinski-Kosterlitz-Thouless phase transition occurs in a similar way and at the same temperature as in the flat 2D space. A possible generalization of our technique to any dimension of the embedding space is discussed.

Dmitri Boulatov; Vladimir Kazakov

2000-12-22T23:59:59.000Z

275

Magnetism.1  

Science Journals Connector (OSTI)

... each complete magnets with a pair of poles. The general character of the earth's magnetism has long been known—that the earth behaves with regard to magnets as though it ... and that these poles have a slow secular motion. For many years the earth's magnetism has been the subject of careful study by the most powerful minds. Gauss organized ...

1890-01-16T23:59:59.000Z

276

Earth’s magnetism  

Science Journals Connector (OSTI)

Earth’s magnetism, geomagnetism, terrestrial magnetism [The magnetism of the Earth] ? Erdmagnetismus m, Geomagnetismus

2014-08-01T23:59:59.000Z

277

Lensless Imaging of Magnetic Nanostructures  

NLE Websites -- All DOE Office Websites (Extended Search)

Lensless Imaging of Magnetic Lensless Imaging of Magnetic Nanostructures Lensless Imaging of Magnetic Nanostructures Print Wednesday, 28 March 2012 00:00 Magnetism is useful for many devices and techniques, from electric motors and computer hard drives to magnetic resonance imaging used in medicine. By studying the basics of magnetism, scientists aim to better understand the fundamental physical principles that govern magnetic systems, perhaps leading to important new technologies. The high brightness and coherence of the ALS's soft x-rays have enabled scientists to apply lensless x-ray imaging for the first time to nanometer-scale magnetic structures in an alloy. Many Ways To See You open your eyes and detect the light rays streaming through your bedroom window (transmission), illuminating your socks on the floor (scattering). You put on your glasses (refraction) to detect the state of your image in the mirror (reflection). If you are an ALS scientist, perhaps you go to work and shine some x-ray light on a crystal to detect the arrangement of the atoms in the crystal (diffraction). Now, thanks to Turner et al., you can also shine some x-ray light on a magnetic sample to detect the arrangement of its electron spins through a method known as lensless imaging. This last example is an equally valid way to "see," but instead of using windows, lenses, or mirrors to manipulate light and construct an image, mathematical formulas are used to describe the effects that particles and fields in the sample have on the light. These formulas have always contained terms that relate to the electron spin of magnetic atoms, but they were previously ignored. Using the full formula allows for the determination of not only crystal structure, but magnetic spin distribution and orientation as well, with a spatial resolution limited only by the wavelength of x-rays used. This promising method can be used at any coherent light source, including modern x-ray free-electron lasers, where ultrashort pulses would freeze-frame magnetic changes, offering the potential for imaging in unprecedented detail the structure and motion of boundaries between regions with different magnetic orientation.

278

Thermodynamics of magnetized binary compact objects  

SciTech Connect

Binary systems of compact objects with electromagnetic field are modeled by helically symmetric Einstein-Maxwell spacetimes with charged and magnetized perfect fluids. Previously derived thermodynamic laws for helically symmetric perfect-fluid spacetimes are extended to include the electromagnetic fields, and electric currents and charges; the first law is written as a relation between the change in the asymptotic Noether charge {delta}Q and the changes in the area and electric charge of black holes, and in the vorticity, baryon rest mass, entropy, charge and magnetic flux of the magnetized fluid. Using the conservation laws of the circulation of magnetized flow found by Bekenstein and Oron for the ideal magnetohydrodynamic fluid, and also for the flow with zero conducting current, we show that, for nearby equilibria that conserve the quantities mentioned above, the relation {delta}Q=0 is satisfied. We also discuss a formulation for computing numerical solutions of magnetized binary compact objects in equilibrium with emphasis on a first integral of the ideal magnetohydrodynamic-Euler equation.

Uryu, Koji [Department of Physics, University of the Ryukyus, Senbaru, Nishihara, Okinawa 903-0213 (Japan); Gourgoulhon, Eric [Laboratoire Univers et Theories, UMR 8102 du CNRS, Observatoire de Paris, Universite Paris Diderot, F-92190 Meudon (France); Markakis, Charalampos [Department of Physics, University of Wisconsin-Milwaukee, Post Office Box 413, Milwaukee, Wisconsin 53201 (United States)

2010-11-15T23:59:59.000Z

279

Counter-rotating vortex patches in shear: a model of the effect of wind shear on aircraft trailing vortices  

Science Journals Connector (OSTI)

...significantly a following passenger-containing aircraft and cause an accident. For example, the vortex wake of a Boeing 747 can rotate a Boeing 737 through 45 . This problem is called the trailing-vortex hazard, and since the trailing vortices can...

2002-01-01T23:59:59.000Z

280

Erratum: ``The Hamiltonian structure of a two-dimensional rigid circular cylinder interacting dynamically with N point vortices''  

E-Print Network (OSTI)

interacting dynamically with N point vortices'' Phys. Fluids 14, 1214 ,,2002... Banavara N. Shashikantha) Department of Mechanical Engineering, MSC 3450, PO Box 30001, New Mexico State University, Las Cruces, New of Technology, Pasadena, California 91125 Joel W. Burdickc) Department of Mechanical Engineering, 104

Shashikanth, Banavara N.

Note: This page contains sample records for the topic "magnetic vortices print" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Electron acoustic wave driven vortices with non-Maxwellian hot electrons in magnetoplasmas  

SciTech Connect

Linear dispersion characteristics of the Electron Acoustic Wave (EAW) and the corresponding vortex structures are investigated in a magnetoplasma in the presence of non-Maxwellian hot electrons. In this regard, kappa and Cairns distributed hot electrons are considered. It is noticed that the nonthermal distributions affect the phase velocity of the EAW. Further, it is found that the phase velocity of EAW increases for Cairns and decreases for kappa distributed hot electrons. Nonlinear solutions in the form of dipolar vortices are also obtained for both stationary and non-stationary ions in the presence of kappa distributed hot electrons and dynamic cold electrons. It is found that the amplitude of the nonlinear vortex structures also reduces with kappa factor like the electron acoustic solitons.

Haque, Q. [Theoretical Physics Division, PINSTECH, P. O. Nilore, Islamabad (Pakistan); National Center for Physics Shahdrah Valley Road, Islamabad 44000 (Pakistan); Mirza, Arshad M. [Theoretical Plasma Physics Group, Department of Physics, Quaid-i-Azam University, Islamabad 45320 (Pakistan); Zakir, U. [Institute of Physics and Electronics, University of Peshawar, and Khyber Pakhtun Khwa 25000 (Pakistan); Department of Physics, University of Malakand Chakdara Dir(L), Khyber Pakhtun Khwa 18800 Pakistan (Pakistan)

2014-07-15T23:59:59.000Z

282

Spindles and active vortices in a model of confined filament-motor mixtures  

E-Print Network (OSTI)

Robust self-organization of subcellular structures is a key principle governing the dynamics and evolution of cellular life. In fission yeast cells undergoing division, the mitotic spindle spontaneously emerges from the interaction of microtubules, motor proteins and the confining cell walls, and asters and vortices have been observed to self-assemble in quasi-two dimensional microtubule-kinesin assays. Their is no clear microscopic picture of the role of the active motors driving this pattern formation, and the relevance of continuum modeling to filament-scale structures remains uncertain. Here we present results of numerical simulations of a discrete filament-motor protein model confined to a pressurised cylindrical box. Stable spindles, nematic configurations, asters and high-density semi-asters spontaneously emerge, the latter pair having also been observed in cytosol confined within emulsion droplets. State diagrams are presented delineating each stationary state as the pressure, motor speed and motor de...

Head, David A; Gompper, Gerhard

2011-01-01T23:59:59.000Z

283

Low energy dynamics of $U(1)$ vortices in systems with cholesteric vacuum structure  

E-Print Network (OSTI)

We discuss flux tubes in systems with $U(1)$ gauge, and spin-orbit locked $SO(3)_{S+L}$ symmetry. The spin-orbit locking is achieved explicitly in the Lagrangian by introducing a parity violating twist term which causes the spontaneous breaking of $SO(3)_{S+L} \\rightarrow SO(2)$. Additionally, this term causes a spontaneous breaking of the translational symmetry along a particular direction. Thus, the system appears with a cholesteric vacuum under certain conditions of the parameter space. With this term, the system admits $U(1)$ topologically stable vortices with additional structure in the vortex cores. This added structure leads to additional moduli appearing in the low energy dynamics. We determine these solutions and their low energy theory.

Peterson, Adam; Tallarita, Gianni

2014-01-01T23:59:59.000Z

284

Low energy dynamics of $U(1)$ vortices in systems with cholesteric vacuum structure  

E-Print Network (OSTI)

We discuss flux tubes in systems with $U(1)$ gauge, and spin-orbit locked $SO(3)_{S+L}$ symmetry. The spin-orbit locking is achieved explicitly in the Lagrangian by introducing a parity violating twist term which causes the spontaneous breaking of $SO(3)_{S+L} \\rightarrow SO(2)$. Additionally, this term causes a spontaneous breaking of the translational symmetry along a particular direction. Thus, the system appears with a cholesteric vacuum under certain conditions of the parameter space. With this term, the system admits $U(1)$ topologically stable vortices with additional structure in the vortex cores. This added structure leads to additional moduli appearing in the low energy dynamics. We determine these solutions and their low energy theory.

Adam Peterson; Mikhail Shifman; Gianni Tallarita

2014-09-04T23:59:59.000Z

285

Non-radial instabilities of isothermal Bondi accretion with a shock: vortical-acoustic cycle vs post-shock acceleration  

E-Print Network (OSTI)

The linear stability of isothermal Bondi accretion with a shock is studied analytically in the asymptotic limit of high incident Mach number M_1. The flow is unstable with respect to radial perturbations as expected by Nakayama (1993), due to post-shock acceleration. Its growth time scales like the advection time from the shock r_sh to the sonic point r_son. The growth rate of non-radial perturbations l=1 is higher by a factor M_1^{2/3}, and is therefore intermediate between the advection and acoustic frequencies. Besides these instabilities based on post-shock acceleration, our study revealed another generic mechanism based on the cycle of acoustic and vortical perturbations between the shock and the sonic radius, independently of the sign of post-shock acceleration. The vortical-acoustic instability is fundamentally non-radial. It is fed by the efficient excitation of vorticity waves by the isothermal shock perturbed by acoustic waves. The growth rate exceeds the advection rate by a factor log M_1. Unstable modes cover a wide range of frequencies from the fundamental acoustic frequency ~c/r_sh up to a cut-off ~c/r_son associated with the sonic radius. The highest growth rate is reached for l=1 modes near the cut-off. The additional cycle of acoustic waves between the shock and the sonic radius is responsible for variations of the growth rate by a factor up to 3 depending on its phase relative to the vortical-acoustic cycle. The instability also exists, with a similar growth rate, below the fundamental acoustic frequency down to the advection frequency, as vorticity waves are efficiently coupled to the region of pseudosound. These results open new perspectives to address the stability of shocked accretion flows.

T. Foglizzo

2002-06-17T23:59:59.000Z

286

Satellite Magnetic Resonances of a Bound Pair of Half-Quantum Vortices in Rotating Superfluid He-3-a  

E-Print Network (OSTI)

and Volovik' (SV) suggest- ed that a rather novel type of superAuid vortex, with only a half quantum of circulation [i.e., p= ?,', wherep:?(M/h)fv, dr], is not only theoretically possible in the A-phase of superfluid He as is deduced previously from... temperature dependence in its position and intensity; and (3) an intensity proportional to 0 and sin 0. This is because that, as is noted by SV, a half-quantum vortex must be accompanied by a singu- lar texture of the spin axis d, characterized by a Frank...

Hu, Chia-Ren; MAKI, K.

1987-01-01T23:59:59.000Z

287

Alternating current electrohydrodynamic printing of microdroplets  

Science Journals Connector (OSTI)

This paper discusses the technology of orderly printing of microdroplets by means of electrohydrodynamic print (EHDP) with alternating current (AC). The AC electric field induces charges to reciprocate in the electrohydrodynamic charged jet and generates ...

Gao-Feng Zheng, Hai-Yan Liu, Rong Xu, Xiang Wang, Juan Liu, Han Wang, Dao-Heng Sun

2014-01-01T23:59:59.000Z

288

A Brief History of 3D Printing  

Science Journals Connector (OSTI)

Enormous hype surrounds 3D printing, with predictions that it will spur a ... manufacturing facility. There are many areas where 3D printing really is creating significant change, particularly in...

Joan Horvath

2014-01-01T23:59:59.000Z

289

X-Ray Imaging Current-Driven Magnetic Domain-Wall Motion in Nanowires  

NLE Websites -- All DOE Office Websites (Extended Search)

X-Ray Imaging Current-Driven Magnetic Domain-Wall Motion in Nanowires Print X-Ray Imaging Current-Driven Magnetic Domain-Wall Motion in Nanowires Print The quest to increase both computer data-storage density and the speed at which one can read and write the information remains unconsummated. One novel concept is based on the use of a local electric current to push magnetic domain walls along a thin nanowire. A German, Korean, Berkeley Lab team has used the x-ray microscope XM-1 at the ALS to demonstrate that magnetic domain walls in curved permalloy nanowires can be moved at high speed by injecting nanosecond pulses of spin-polarized currents into the wires, but the motion is largely stochastic. This result will have an impact on the current development of magnetic storage devices in which data is moved electronically rather than mechanically as in computer disk drives.

290

X-Ray Imaging Current-Driven Magnetic Domain-Wall Motion in Nanowires  

NLE Websites -- All DOE Office Websites (Extended Search)

X-Ray Imaging Current-Driven Magnetic Domain-Wall Motion in Nanowires Print X-Ray Imaging Current-Driven Magnetic Domain-Wall Motion in Nanowires Print The quest to increase both computer data-storage density and the speed at which one can read and write the information remains unconsummated. One novel concept is based on the use of a local electric current to push magnetic domain walls along a thin nanowire. A German, Korean, Berkeley Lab team has used the x-ray microscope XM-1 at the ALS to demonstrate that magnetic domain walls in curved permalloy nanowires can be moved at high speed by injecting nanosecond pulses of spin-polarized currents into the wires, but the motion is largely stochastic. This result will have an impact on the current development of magnetic storage devices in which data is moved electronically rather than mechanically as in computer disk drives.

291

X-Ray Imaging Current-Driven Magnetic Domain-Wall Motion in Nanowires  

NLE Websites -- All DOE Office Websites (Extended Search)

X-Ray Imaging Current-Driven Magnetic Domain-Wall Motion in Nanowires Print X-Ray Imaging Current-Driven Magnetic Domain-Wall Motion in Nanowires Print The quest to increase both computer data-storage density and the speed at which one can read and write the information remains unconsummated. One novel concept is based on the use of a local electric current to push magnetic domain walls along a thin nanowire. A German, Korean, Berkeley Lab team has used the x-ray microscope XM-1 at the ALS to demonstrate that magnetic domain walls in curved permalloy nanowires can be moved at high speed by injecting nanosecond pulses of spin-polarized currents into the wires, but the motion is largely stochastic. This result will have an impact on the current development of magnetic storage devices in which data is moved electronically rather than mechanically as in computer disk drives.

292

X-Ray Imaging Current-Driven Magnetic Domain-Wall Motion in Nanowires  

NLE Websites -- All DOE Office Websites (Extended Search)

X-Ray Imaging Current-Driven Magnetic Domain-Wall Motion in Nanowires Print X-Ray Imaging Current-Driven Magnetic Domain-Wall Motion in Nanowires Print The quest to increase both computer data-storage density and the speed at which one can read and write the information remains unconsummated. One novel concept is based on the use of a local electric current to push magnetic domain walls along a thin nanowire. A German, Korean, Berkeley Lab team has used the x-ray microscope XM-1 at the ALS to demonstrate that magnetic domain walls in curved permalloy nanowires can be moved at high speed by injecting nanosecond pulses of spin-polarized currents into the wires, but the motion is largely stochastic. This result will have an impact on the current development of magnetic storage devices in which data is moved electronically rather than mechanically as in computer disk drives.

293

X-Ray Imaging Current-Driven Magnetic Domain-Wall Motion in Nanowires  

NLE Websites -- All DOE Office Websites (Extended Search)

X-Ray Imaging Current-Driven Magnetic Domain-Wall Motion in Nanowires Print X-Ray Imaging Current-Driven Magnetic Domain-Wall Motion in Nanowires Print The quest to increase both computer data-storage density and the speed at which one can read and write the information remains unconsummated. One novel concept is based on the use of a local electric current to push magnetic domain walls along a thin nanowire. A German, Korean, Berkeley Lab team has used the x-ray microscope XM-1 at the ALS to demonstrate that magnetic domain walls in curved permalloy nanowires can be moved at high speed by injecting nanosecond pulses of spin-polarized currents into the wires, but the motion is largely stochastic. This result will have an impact on the current development of magnetic storage devices in which data is moved electronically rather than mechanically as in computer disk drives.

294

Processing A Printed Wiring Board By Single Bath Electrodeposition  

DOE Patents (OSTI)

A method of processing a printed wiring board by single bath electrodeposition. Initial processing steps are implemented on the printed wiring board. Copper is plated on the printed wiring board from a bath containing nickel and copper. Nickel is plated on the printed wiring board from the bath containing nickel and copper and final processing steps are implemented on the printed wiring board.

Meltzer, Michael P. (Oakland, CA); Steffani, Christopher P. (Livermore, CA); Gonfiotti, Ray A. (Livermore, CA)

2003-04-15T23:59:59.000Z

295

Processing a printed wiring board by single bath electrodeposition  

DOE Patents (OSTI)

A method of processing a printed wiring board. Initial processing steps are implemented on the printed wiring board. Copper is plated on the printed wiring board from a bath containing nickel and copper. Nickel is plated on the printed wiring board from a bath containing nickel and copper and final processing steps are implemented on the printed wiring board.

Meltzer, Michael P. (Oakland, CA); Steffani, Christopher P. (Livermore, CA); Gonfiotti, Ray A. (Livermore, CA)

2010-12-07T23:59:59.000Z

296

Stochastic Domain-Wall Depinning in Magnetic Nanowires  

NLE Websites -- All DOE Office Websites (Extended Search)

Stochastic Domain-Wall Depinning Stochastic Domain-Wall Depinning in Magnetic Nanowires Stochastic Domain-Wall Depinning in Magnetic Nanowires Print Wednesday, 29 July 2009 00:00 Reliably controlling the motion of magnetic domain walls along magnetic nanowires is a key requirement for current technological development of novel classes of logic and storage devices, but understanding the nature of non-deterministic domain-wall motion remains a scientific challenge. A statistical analysis of high-resolution magnetic soft x-ray microscopy images by a Berkeley Lab-University of Hamburg group has now revealed that the stochastic behavior of the domain-wall depinning field in notch-patterned Ni80Fe20 (permalloy) nanowires depends strongly on the wire width and the notch depth. This result both provides valuable insight into the motion of magnetic-domain walls and opens a path to further technological developments in spintronics applications.

297

Unexpected Angular Dependence of X-Ray Magnetic Linear Dichroism  

NLE Websites -- All DOE Office Websites (Extended Search)

Unexpected Angular Dependence of Unexpected Angular Dependence of X-Ray Magnetic Linear Dichroism Unexpected Angular Dependence of X-Ray Magnetic Linear Dichroism Print Wednesday, 29 August 2007 00:00 Using spectroscopic information for magnetometry and magnetic microscopy obviously requires detailed theoretical understanding of spectral shape and magnitude of dichroism signals. A research team at ALS Beamline 4.0.2 has now shown unambiguously that, contrary to common belief, spectral shape and magnitude of x-ray magnetic linear dichroism (XMLD) are not only determined by the relative orientation of magnetic moments and x-ray polarization, but their orientation relative to the crystallographic axes must be taken into account for accurate interpretation of XMLD data. Magnetism and X Rays

298

Modern Magnetism  

Science Journals Connector (OSTI)

... BATES‘S "Modern Magnetism", first published in 1939, is widely appreciated as a general survey in which ... grateful to the author for collecting together so much interesting information about recent work in magnetism. ...

E. C. S.

1948-06-05T23:59:59.000Z

299

Printing a poster? Make an appointment!  

E-Print Network (OSTI)

Printing a poster? Make an appointment! Sizing your poster correctly: The first step in successfully printing a poster is making sure that you have your document sized correctly. The poster printer has a maximum width of 42" (all posters will be printed on size 42" paper.) Length can vary beyond

Niebur, Ernst

300

Commensurability effects in a Josephson tunnel junction in the field of an array of magnetic particles  

SciTech Connect

Commensurability effects have been theoretically studied in a hybrid system consisting of a Josephson junction located in a nonuniform field induced by an array of magnetic particles. A periodic phase-difference distribution in the junction that is caused by the formation of a regular lattice of Abrikosov vortices generated by the magnetic field of the particles in superconducting electrodes is calculated. The dependence of the critical current through the junction I{sub c} on the applied magnetic field H is shown to differ strongly from the conventional Fraunhofer diffraction pattern because of the periodic modulation of the Josephson phase difference created by the vortices. More specifically, the I{sub c}(H) pattern contains additional resonance peaks, whose positions and heights depend on the parameters and magnetic state of the particles in the array. These specific features of the I{sub c}(H) dependence are observed when the period of the Josephson current modulation by the field of the magnetic particles and the characteristic scale of the change in the phase difference by the applied magnetic field are commensurable. The conditions that determine the positions of the commensurability peaks are obtained, and they are found to agree well with experimental results.

Samokhvalov, A. V. [Russian Academy of Sciences, Institute for Physics of Microstructures (Russian Federation)], E-mail: samokh@ipm.sci-nnov.ru

2007-03-15T23:59:59.000Z

Note: This page contains sample records for the topic "magnetic vortices print" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Introduction to 3D Printing  

Science Journals Connector (OSTI)

Three-dimensional (3D) printing has evolved dramatically in the last few years. 3D printers have become plentiful and affordable enough ... can own one. Indeed, the cost of 3D printers (as little as $200 USD) ......

Charles Bell

2014-01-01T23:59:59.000Z

302

Migratory magnetism  

Science Journals Connector (OSTI)

... in tune with the Earth's magnetic field. But how, exactly, do creatures sense magnetism? This is one of the most intriguing questions in modern biology - and also ... move preferentially in a north-south direction. This finding hints at the possible influence of magnetism on their movements. ...

Henry Gee

1999-10-06T23:59:59.000Z

303

The Astrophysical Journal, 701:19111921, 2009 August 20 doi:10.1088/0004-637X/701/2/1911 C 2009. The American Astronomical Society. All rights reserved. Printed in the U.S.A.  

E-Print Network (OSTI)

the convection zone is a central process of solar physics. The intense magnetic fields that constitute active. The American Astronomical Society. All rights reserved. Printed in the U.S.A. CURRENT BUILDUP IN EMERGING; accepted 2009 July 6; published 2009 August 6 ABSTRACT The increase of magnetic flux in the solar

Demoulin, Pascal

304

Magnetic Testing of Bonded Magnets  

Science Journals Connector (OSTI)

Many techniques exist to characterize the magnetic properties of bonded magnets. We will review the common and not so common techniques in use, with emphasis on the advantages and disadvantages of each one, an...

S. R. Trout

2003-01-01T23:59:59.000Z

305

Magnetic Vortex Core Reversal by Low-Field Excitations  

NLE Websites -- All DOE Office Websites (Extended Search)

Magnetic Vortex Core Reversal by Magnetic Vortex Core Reversal by Low-Field Excitations Magnetic Vortex Core Reversal by Low-Field Excitations Print Wednesday, 28 March 2007 00:00 In micrometer-sized magnetic thin films, the magnetization typically adopts an in-plane, circular configuration known as a magnetic vortex. At the vortex core, the magnetization turns sharply out of the plane, pointing either up or down. Magnetic data storage based on this binary phenomenon is an intriguing concept, but it would require the ability to flip the vortex cores on demand. Because these structures are highly stable, very strong magnetic fields of around half a tesla (approximately one-third the field of the strongest permanent magnet) were previously thought to be necessary to accomplish this. At the ALS, a team of researchers from Germany, Belgium, and the U.S. has used time-resolved scanning transmission x-ray microscopy (STXM) to observe vortex motion and demonstrate the feasibility of using weak magnetic fields as low as 1.5 millitesla (mT) to reverse the direction of a vortex core. The observed switching mechanism, which can be understood within the framework of micromagnetic theory, gives insights into basic magnetization dynamics and their possible application to data storage technologies.

306

Berkeley Lab UNIX-based Distributed Printing (DP)  

NLE Websites -- All DOE Office Websites (Extended Search)

Berkeley Lab UNIX-based Distributed Printing (DP) Berkeley Lab UNIX-based Distributed Printing (DP) LBNL Computing Services supports a variety of printers located throughout the Laboratory through its UNIX-based Distributed Printing System. Make sure to read the UNIX distributed printing overview. See Novell printing for information on Novell-based printing here. Berkeley Lab UNIX-based Distributed Printing (DP) Information Overview Print commands Print charges Printer lists (by division, etc.) Add a new DP printer name paper sizes (a4, etc.) Fixes for common problems Deleting print jobs on Solaris Printer-specific information Groff (GNU ditroff) on Sun & SGI System Admin Information CUPS printing information CUPS FAQ LINUX test suite of files; etc. Setting default printer using lpoptions Test suite of print files

307

A 3D Printed Fluidic Device that Enables Integrated Features  

Science Journals Connector (OSTI)

Fluorescence Detector for Capillary Separations Fabricated by 3D Printing ... Fluorescence Detector for Capillary Separations Fabricated by 3D Printing ... Evaluation of 3D Printing and Its Potential Impact on Biotechnology and the Chemical Sciences ...

Kari B. Anderson; Sarah Y. Lockwood; R. Scott Martin; Dana M. Spence

2013-05-21T23:59:59.000Z

308

PAPILLON: Designing Curved Display Surfaces With Printed Optics  

E-Print Network (OSTI)

. It is based on 3D printed optics, where the surface of the display is constructed as a bundle of printed light Interfaces - Graphical user interfaces; Input devices and strategies. Keywords: 3D printing, fabrication

Poupyrev, Ivan

309

E-print Network : Main View : Deep Federated Search  

NLE Websites -- All DOE Office Websites (Extended Search)

E-print Network Search Powered By Deep Web Technologies New Search Preferences E-print Network E-print Network Skip to main content FAQ * HELP * SITE MAP * CONTACT US Home * About...

310

Design and Field Measurements of Printed-Circuit Quadrupoles and Dipoles  

SciTech Connect

Air-core printed-circuit (PC) quadrupoles and dipoles have been developed for the University of Maryland electron ring, currently under construction. The quadrupoles and dipoles are characterized by very small magnetic fields (about 15 G at the aperture edge) and small aspect ratios (length/diameter < 1). We review the theory behind the design of the PC lenses and bending elements, and present general expressions for estimating the values of integrated field and integrated field gradient as functions of design parameters. The new quadrupole magnet represents an improvement over an earlier version which was based on an empirical approach. Further, we summarize the results of multipole content of the magnet fields as measured with a rotating coil apparatus of special construction. The results are compared with calculations with an iron-free magnetics code and are related to different types of errors in the manufacture and assembly of the PC magnets.

Zhang, W.W.; Bernal, S.; Li, H.; Godlove, T.; Kishek, R.A.; O'Shea, P.G.; Reiser, M.; Yun, V.; /Maryland U., IPR; Venturini, M.; /SLAC

2011-11-08T23:59:59.000Z

311

Mesoscale Convective Vortices in Multiscale, Idealized Simulations: Dependence on Background State, Interdependency with Moist Baroclinic Cyclones, and Comparison with BAMEX Observations  

Science Journals Connector (OSTI)

A set of multiscale, nested, idealized numerical simulations of mesoscale convective systems (MCSs) and mesoscale convective vortices (MCVs) was conducted. The purpose of these simulations was to investigate the dependence of MCV development and ...

Robert J. Conzemius; Michael T. Montgomery

2010-04-01T23:59:59.000Z

312

Unexpected Angular Dependence of X-Ray Magnetic Linear Dichroism  

NLE Websites -- All DOE Office Websites (Extended Search)

Unexpected Angular Dependence of X-Ray Magnetic Linear Dichroism Print Unexpected Angular Dependence of X-Ray Magnetic Linear Dichroism Print Using spectroscopic information for magnetometry and magnetic microscopy obviously requires detailed theoretical understanding of spectral shape and magnitude of dichroism signals. A research team at ALS Beamline 4.0.2 has now shown unambiguously that, contrary to common belief, spectral shape and magnitude of x-ray magnetic linear dichroism (XMLD) are not only determined by the relative orientation of magnetic moments and x-ray polarization, but their orientation relative to the crystallographic axes must be taken into account for accurate interpretation of XMLD data. Magnetism and X Rays The ancient Greeks and also the Chinese knew about strange and rare stones with the power to attract iron. Moreover, when freely suspended these objects pointed north-south. Throughout the past, we have used this phenomenon-magnetism-for navigation and more recently for power production and digital information storage, all while trying to explore and understand its origins. In 1986 researchers at a facility similar to the ALS observed for the first time that the absorption of x rays depends not only on the composition of a material-that is, if it contains iron, nickel, or other elements-but also on its magnetism. The effect is unique in that it allows us to distinguish which atomic species magnetism originates from and provides information about their local atomic environment-for example, whether a magnetic species is surrounded by 4 or 6 oxygen atoms. A research team at the ALS has now shown that the relationship between magnetic order and absorption of x rays is even more complex and exciting than has been assumed for the past 20 years, leading to a reassessment of previous results.

313

Unexpected Angular Dependence of X-Ray Magnetic Linear Dichroism  

NLE Websites -- All DOE Office Websites (Extended Search)

Unexpected Angular Dependence of X-Ray Magnetic Linear Dichroism Print Unexpected Angular Dependence of X-Ray Magnetic Linear Dichroism Print Using spectroscopic information for magnetometry and magnetic microscopy obviously requires detailed theoretical understanding of spectral shape and magnitude of dichroism signals. A research team at ALS Beamline 4.0.2 has now shown unambiguously that, contrary to common belief, spectral shape and magnitude of x-ray magnetic linear dichroism (XMLD) are not only determined by the relative orientation of magnetic moments and x-ray polarization, but their orientation relative to the crystallographic axes must be taken into account for accurate interpretation of XMLD data. Magnetism and X Rays The ancient Greeks and also the Chinese knew about strange and rare stones with the power to attract iron. Moreover, when freely suspended these objects pointed north-south. Throughout the past, we have used this phenomenon-magnetism-for navigation and more recently for power production and digital information storage, all while trying to explore and understand its origins. In 1986 researchers at a facility similar to the ALS observed for the first time that the absorption of x rays depends not only on the composition of a material-that is, if it contains iron, nickel, or other elements-but also on its magnetism. The effect is unique in that it allows us to distinguish which atomic species magnetism originates from and provides information about their local atomic environment-for example, whether a magnetic species is surrounded by 4 or 6 oxygen atoms. A research team at the ALS has now shown that the relationship between magnetic order and absorption of x rays is even more complex and exciting than has been assumed for the past 20 years, leading to a reassessment of previous results.

314

Minutes from the May 26, 2010 Printing and Mail Teleconference  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

26, 2010 26, 2010 Printing and Mail Managers Exchange Forum Teleconference Seventeen individuals participated in the Printing and Mail Managers Exchange Forum, which included Printing and Mail Managers and Contractors. Comments/Additions to last Months Minutes Dallas Woodruff, Headquarters opened the meeting by thanking everyone for participating in the today's teleconference. Printing Agenda Items... Update on the FY 2010, Congressional Joint Committee on Printing Commercial Printing Report "JCP Form No. 2" Dallas Woodruff, Headquarters informed the group that Headquarters received responses from all DOE printing and duplicating facilities. The report is due to the Congressional Joint Committee on Printing no later than May 31, 2010.

315

Dispenser Printed Zinc Microbattery with an Ionic Liquid Gel Electrolyte  

E-Print Network (OSTI)

using dispenser printing including (a) 3D polymer molds, (b)using dispenser printing including (a) 3D polymer molds, (b)

Ho, Christine Chihfan

2010-01-01T23:59:59.000Z

316

Printing a Car: A Team Effort in Innovation (Text Version) |...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

video Printing a Car: A Team Effort in Innovation highlighting the demonstration of 3D printing to create a working electric vehicle, live during the International Manufacturing...

317

Experimental analysis of the vorticity and turbulent flow dynamics of a pitching airfoil at realistic flight (helicopter) conditions  

E-Print Network (OSTI)

: Chair of Committee, Rodney Bowersox Committee Members, Othon Rediniotis Paul Cizmas Simon North Head of Department, Helen Reed May 2008 Major Subject: Aerospace Engineering iii ABSTRACT Experimental Analysis of the Vorticity... to express my sincerest gratitude and appreciation to my advisor Dr. Rodney Bowersox for his valuable guidance throughout the progress of this research. I am grateful to him for motivating me during my tough times. I thank Dr. Othon Rediniotis, Dr. Paul...

Sahoo, Dipankar

2008-10-10T23:59:59.000Z

318

Electro/Magnetically Induced Controllable Rotation In Small-scale Liquid Flow  

E-Print Network (OSTI)

We study all the possibilities of producing rotating flow in an incompressible fluid by electric and magnetic fields. We start with a general theoretical basis and look for different configurations and set-ups which electric/magnetic field and an electric current affect the vorticity of fluid resulting in rotation on liquid flow. We assume steady-state conditions and time-independent electric and magnetic fields as the external body torque. Regarding the theoretical basis, we propose three experimental set-ups in which by applying fields on a fluid, rotational vortices are produced: (a) a uniform electric field and a uniform electric current, (b) a uniform electric current and a non-uniform magnetic field, and (c) a non-uniform electric current and a uniform magnetic field. The first case has been reported in detail named "Liquid Film Motor". The two other cases are experimentally investigated here for a cubic an cylindrical cells. The rotational velocity patterns are obtained by PIV technique, and the result...

Amjadi, A; Sobhani, S O; Shirsavar, R

2013-01-01T23:59:59.000Z

319

Magnetic shielding  

DOE Patents (OSTI)

A magnetically-conductive filler material bridges the gap between a multi-part magnetic shield structure which substantially encloses a predetermined volume so as to minimize the ingress or egress of magnetic fields with respect to that volume. The filler material includes a heavy concentration of single-magnetic-domain-sized particles of a magnetically conductive material (e.g. soft iron, carbon steel or the like) dispersed throughout a carrier material which is generally a non-magnetic material that is at least sometimes in a plastic or liquid state. The maximum cross-sectional particle dimension is substantially less than the nominal dimension of the gap to be filled. An epoxy base material (i.e. without any hardening additive) low volatility vacuum greases or the like may be used for the carrier material. The structure is preferably exposed to the expected ambient magnetic field while the carrier is in a plastic or liquid state so as to facilitate alignment of the single-magnetic-domain-sized particles with the expected magnetic field lines. 3 figs.

Kerns, J.A.; Stone, R.R.; Fabyan, J.

1987-10-06T23:59:59.000Z

320

Magnetic shielding  

DOE Patents (OSTI)

A magnetically-conductive filler material bridges the gap between a multi-part magnetic shield structure which substantially encloses a predetermined volume so as to minimize the ingress or egress of magnetic fields with respect to that volume. The filler material includes a heavy concentration of single-magnetic-domain-sized particles of a magnetically conductive material (e.g. soft iron, carbon steel or the like) dispersed throughout a carrier material which is generally a non-magnetic material that is at least sometimes in a plastic or liquid state. The maximum cross-sectional particle dimension is substantially less than the nominal dimension of the gap to be filled. An epoxy base material (i.e. without any hardening additive) low volatility vacuum greases or the like may be used for the carrier material. The structure is preferably exposed to the expected ambient magnetic field while the carrier is in a plastic or liquid state so as to facilitate alignment of the single-magnetic-domain-sized particles with the expected magnetic field lines.

Kerns, John A. (Livermore, CA); Stone, Roger R. (Walnut Creek, CA); Fabyan, Joseph (Livermore, CA)

1987-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "magnetic vortices print" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Strange Magnetism  

E-Print Network (OSTI)

We present an analytic and parameter-free expression for the momentum dependence of the strange magnetic form factor of the nucleon and its corresponding radius which has been derived in Heavy Baryon Chiral Perturbation Theory. We also discuss a model-independent relation between the isoscalar magnetic and the strange magnetic form factors of the nucleon based on chiral symmetry and SU(3) only. These limites are used to derive bounds on the strange magnetic moment of the proton from the recent measurement by the SAMPLE collaboration.

Thomas R. Hemmert; Ulf-G. Meissner; Sven Steininger

1998-11-09T23:59:59.000Z

322

Optical Magnetism  

Science Journals Connector (OSTI)

Magnetic dipole radiation one fourth as intense as electric dipole radiation, as well as a novel nonlinear magneto-optical effect are reported in dielectric media.

Oliveira, Samuel L; Rand, Stephen C

323

Quiver gauge theory of non-Abelian vortices and noncommutative instantons in higher dimensions  

SciTech Connect

We construct explicit Bogomolnyi, Prasad, Sommerfeld (BPS) and non-BPS solutions of the Yang-Mills equations on the noncommutative space R{sub {theta}}{sup 2n}xS{sup 2} which have manifest spherical symmetry. Using SU(2)-equivariant dimensional reduction techniques, we show that the solutions imply an equivalence between instantons on R{sub {theta}}{sup 2n}xS{sup 2} and non-Abelian vortices on R{sub {theta}}{sup 2n}, which can be interpreted as a blowing-up of a chain of D0-branes on R{sub {theta}}{sup 2n} into a chain of spherical D2-branes on R{sub {theta}}{sup 2n}xS{sup 2}. The low-energy dynamics of these configurations is described by a quiver gauge theory which can be formulated in terms of new geometrical objects generalizing superconnections. This formalism enables the explicit assignment of D0-brane charges in equivariant K-theory to the instanton solutions.

Popov, Alexander D.; Szabo, Richard J. [Institut fuer Theoretische Physik, Universitaet Hannover, Appelstrasse 2, 30167 Hannover (Germany); Bogoliubov Laboratory of Theoretical Physics, JINR, 141980 Dubna (Russian Federation); Department of Mathematics, Heriot-Watt University, Colin Maclaurin Building, Riccarton, Edinburgh EH14 4AS (United Kingdom)

2006-01-15T23:59:59.000Z

324

Ertel's vorticity theorem and new flux surfaces in multi-fluid plasmas  

SciTech Connect

Dedicated to Professor Harold Weitzner on the occasion of his retirement“Say to wisdom ‘you are my sister,’ and to insight ‘you are my relative.’”—Proverbs 7:4Based on an extension to plasmas of Ertel's classical vorticity theorem in fluid dynamics, it is shown that for each species in a multi-fluid plasma there can be constructed a set of nested surfaces that have this species' fluid particles confined within them. Variational formulations for the plasma evolution and its equilibrium states are developed, based on the new surfaces and all of the dynamical conservation laws associated with them. It is shown that in the general equilibrium case, the energy principle lacks a minimum and cannot be used as a stability criterion. A limit of the variational integral yields the two-fluid Hall-magnetohydrodynamic (MHD) model. A further special limit yields MHD equilibria and can be used to approximate the equilibrium state of a Hall-MHD plasma in a perturbative way.

Hameiri, Eliezer [Courant Institute of Mathematical Sciences, New York University, New York, New York 10012 (United States)] [Courant Institute of Mathematical Sciences, New York University, New York, New York 10012 (United States)

2013-09-15T23:59:59.000Z

325

Magnetic Field Safety Magnetic Field Safety  

E-Print Network (OSTI)

Magnetic Field Safety Training #12;Magnetic Field Safety Strong Magnetic Fields exist around energized magnets. High magnetic fields alone are a recognized hazard only for personnel with certain medical conditions such as pacemakers, magnetic implants, or embedded shrapnel. In addition, high magnetic

McQuade, D. Tyler

326

Magnetic Field Safety Training  

NLE Websites -- All DOE Office Websites (Extended Search)

Safety Training Magnetic Field Safety Strong Magnetic Fields exist around energized magnets. High magnetic fields alone are a recognized hazard only for personnel with certain...

327

Widget:PrintFullVersionButton | Open Energy Information  

Open Energy Info (EERE)

PrintFullVersionButton PrintFullVersionButton Jump to: navigation, search This widget creates a button, which create a button matching the PrintPDF button style, which will direct the user to the assembled page. This template assumes the existence of the PrintPDFButton widget and template. Parameters page - The wiki address of the assembled page, or full version to be printed. cover - The name of a wiki page to use as a cover page (optional) Dependencies Template:PrintFullVersionButton Template:PrintPDFButton Widget:PrintPDFButton Usage This Widget assumes the existence of HTML elements created by the PrintFullVersionButton template, and is called via that template. {{PrintFullVersionButton}} Example {{PrintFullVersionButton}} (displays in the upper right corner of the page) Retrieved from

328

Clean Cities: Clean Cities Print Products and Templates  

NLE Websites -- All DOE Office Websites (Extended Search)

Print Products and Print Products and Templates to someone by E-mail Share Clean Cities: Clean Cities Print Products and Templates on Facebook Tweet about Clean Cities: Clean Cities Print Products and Templates on Twitter Bookmark Clean Cities: Clean Cities Print Products and Templates on Google Bookmark Clean Cities: Clean Cities Print Products and Templates on Delicious Rank Clean Cities: Clean Cities Print Products and Templates on Digg Find More places to share Clean Cities: Clean Cities Print Products and Templates on AddThis.com... Coordinator Basics Outreach Logos, Graphics, & Photographs Print Products & Templates Exhibit Booths Presentations Videos QR Codes Tips Education & Webinars Meetings Reporting Contacts Clean Cities Print Products and Templates Clean Cities has a wide variety of print products, marketing materials, and

329

E-print Network : Main View : Deep Federated Search  

Office of Scientific and Technical Information (OSTI)

E-print Network E-print Network Search Powered By Deep Web Technologies New Search Preferences E-print Network E-print Network Skip to main content FAQ * HELP * SITE MAP * CONTACT US Home * About * Advanced Search * Browse by Discipline * Scientific Societies * E-print Alerts * Add E-prints Powered by Deep Web Technologies E-print Network E-print Network Skip to main content FAQ * HELP * SITE MAP * CONTACT US Home * About * Advanced Search * Browse by Discipline * Scientific Societies * E-print Alerts * Add E-prints Main View This view is used for searching all possible sources. Due to the varied configuration and diversity of web pages and databases searched by E-prints, Full Record will search whatever data is searchable at each site. Multiple arXiv sites under one general heading are combined

330

Minutes from the Print and Mail Managers Exchange Forum Teleconferences |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Minutes from the Print and Mail Managers Exchange Forum Minutes from the Print and Mail Managers Exchange Forum Teleconferences Minutes from the Print and Mail Managers Exchange Forum Teleconferences Minutes from the Print and Mail Managers Exchange Forum Teleconferences. Contact the Office of Administrative Management and Support at (202) 586-4318 with any questions. Last updated 04/01/13 Minutes from the March 14, 2013 Printing and Mail Teleconference Minutes from the January 10, 2013 Printing and Mail Teleconference Minutes from the November 01, 2012 Printing and Mail Teleconference Minutes from the June 28, 2012 Printing and Mail Teleconference Minutes from the May 03, 2012 Printing and Mail Teleconference Minutes from the February 23, 2012 Printing and Mail Teleconference Minutes from the October 26, 2011 Printing and Mail Teleconference

331

Magnetic insulation  

Science Journals Connector (OSTI)

... by Winterberg1, led me to look into the background of the idea of 'magnetic insulation'. The purpose of this letter is to point out that the scheme described in ... were presented earlier in a longer article2. In that article he suggested that 'magnetic insulation' might make possible a transformer for 109 V. A year later the same objections ...

JOHN P. BLEWETT

1974-06-28T23:59:59.000Z

332

Magnetism1  

Science Journals Connector (OSTI)

... is reached, the rate of diminution becomes very rapid indeed, until, finally, the magnetism of the iron disappears at the same time as for small forces. Instead of ... a lower maximum, and its rise is less rapid. The critical temperature at which magnetism disappears changes rapidly with the composition of the steel. For very soft charcoal iron ...

1890-01-23T23:59:59.000Z

333

Magnetism Group  

Science Journals Connector (OSTI)

... of the Institute of Physics and the Physical Society has announced the establishment of a Magnetism Group. The aim of the new Group is to further interest in ... Group. The aim of the new Group is to further interest in magnetism by holding regular discussion meetings and in other ways. It is intended that these ...

1965-09-04T23:59:59.000Z

334

Terrestrial Magnetism*  

Science Journals Connector (OSTI)

... A similar investigation of the effect of the moon's action on terrestrial magnetism requires a series of observations made at much less distant intervals than the monthly ones ... heat, from the central body of our system, or merely having its own inherent magnetism modified by solar action, then we must choose as our unit the lunation, or ...

1873-01-09T23:59:59.000Z

335

Terrestrial Magnetism*  

Science Journals Connector (OSTI)

... IN bringing before you this evening, gentlemen, the subject of terrestrial magnetism, it is not my intention to attempt to present you with an exhaustive paper ... clearly as I am able, what is the actual condition of our knowledge respecting the magnetism of the globe, and what the nature of its complex variations, without, however, ...

1873-01-02T23:59:59.000Z

336

Terrestrial Magnetism  

Science Journals Connector (OSTI)

... THE present activity of the department of terrestrial magnetism of the Carnegie Institution of Washington and the largeness of its future aims are alike ... a “progress report” which he contributes to the latest (March) number of Terrestrial Magnetism. The department, which has lately entered on its eleventh year, has under construetion ...

C. CHREE

1914-07-23T23:59:59.000Z

337

Remanent Magnetism  

Science Journals Connector (OSTI)

... STUDY of the natural remanent magnetism of rocks is becoming a familiar method for determining the direction of the Earth's ... the geomagnetic poles or of the continents themselves. An alternative use for measurements of remanent magnetism, namely, the determination of the temperature of formation of pyroclastic deposits, is described ...

1958-03-22T23:59:59.000Z

338

Magnetic shielding  

DOE Patents (OSTI)

A magnetically-conductive filler material bridges the gap between a multi-part magnetic shield structure which substantially encloses a predetermined volume so as to minimize the ingress or egress of magnetic fields with respect to that volume. The filler material includes a heavy concentration of single-magnetic-domain-sized particles of a magnetically conductive material (e.g. soft iron, carbon steel or the like) dispersed throughout a carrier material which is generally a non-magnetic material that is at least sometimes in a plastic or liquid state. The maximum cross-sectional particle dimension is substantially less than the nominal dimension of the gap to be filled. An epoxy base material (i.e. without any hardening additive) low volatility vacuum greases or the like may be used for the carrier material. The structure is preferably exposed to the expected ambient field while the carrier is in a plastic or liquid state so as to facilitate alignment of the single-magnetic-domain-sized particles with the expected magnetic field lines.

Kerns, J.A.; Stone, R.R.; Fabyan, J.

1985-02-12T23:59:59.000Z

339

Print the Fuel Economy Guide  

NLE Websites -- All DOE Office Websites (Extended Search)

Print the Fuel Economy Guide Print the Fuel Economy Guide 2014 Fuel Economy Guide 2014 Fuel Economy Guide Adobe Acrobat Icon MPG data updated December 19, 2013 The annual fuel cost estimates in the 2008-2014 electronic fuel economy guides are updated weekly to match EIA's current national average prices for gasoline and diesel fuel. Order a printed copy: Order Note that the published guides may not be as up-to-date at the downloadable version. View vehicles from 1984 to the present: Go to Find-a-Car Unlike the annual guides which cover only one model year, Find-a-Car provides the most up-to-date fuel economy information for vehicles from model year 1984 to the present, along with environmental and safety data. Find a Car Developer Tools 2013 Fuel Economy Guide 2013 Fuel Economy Guide Adobe Acrobat Icon

340

Superconducting Magnets  

NLE Websites -- All DOE Office Websites (Extended Search)

Mit Hilfe der Technologie supraleitender Magnete lassen sich in Mit Hilfe der Technologie supraleitender Magnete lassen sich in Ringbeschleunigern höhere Energien erreichen. Weil supraleitende Spulen keinen elektrischen Widerstand aufweisen, können damit stärkere Magnetfelder erzeugt werden. In normal leitenden Elektromagneten wird - wegen des elektrischen Widerstands der Drähte - die Spule aufgeheizt. Auf diese Weise geht sehr viel Energie in Form von Wärme verloren, was die Energiekosten dieser Magnete in die Höhe treibt. Supraleitende Spulen erlauben es, Magnete grosser Feldstärke unter günstigen Bedingungen zu betreiben und damit die Energiekosten zu senken. Durch den Einbau supraleitender Spulen in den Ringbeschleuniger von Fermilab konnte dessen Energie verdoppelt werden.Auch der im Bau befindliche "Large Hadron Collider" am CERN wird supraleitende Magnete

Note: This page contains sample records for the topic "magnetic vortices print" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Magnetic nanotubes  

DOE Patents (OSTI)

A magnetic nanotube includes bacterial magnetic nanocrystals contacted onto a nanotube which absorbs the nanocrystals. The nanocrystals are contacted on at least one surface of the nanotube. A method of fabricating a magnetic nanotube includes synthesizing the bacterial magnetic nanocrystals, which have an outer layer of proteins. A nanotube provided is capable of absorbing the nanocrystals and contacting the nanotube with the nanocrystals. The nanotube is preferably a peptide bolaamphiphile. A nanotube solution and a nanocrystal solution including a buffer and a concentration of nanocrystals are mixed. The concentration of nanocrystals is optimized, resulting in a nanocrystal to nanotube ratio for which bacterial magnetic nanocrystals are immobilized on at least one surface of the nanotubes. The ratio controls whether the nanocrystals bind only to the interior or to the exterior surfaces of the nanotubes. Uses include cell manipulation and separation, biological assay, enzyme recovery, and biosensors.

Matsui, Hiroshi (Glen Rock, NJ); Matsunaga, Tadashi (Tokyo, JP)

2010-11-16T23:59:59.000Z

342

ALSNews Vol. 334  

NLE Websites -- All DOE Office Websites (Extended Search)

4 Print 4 Print Not All Nanodisk Magnetic Vortices Are Created Equally Magnetic vortices - hurricanes of magnetism only a few atoms across - have been found to form asymmetrically in ferromagnetic nanodisks. This finding contradicts previous beliefs and poses challenges to using magnetic vortices in random access memory (RAM) data storage systems. Read more... Contact: Mi-Young Im A New Route to Nanoscale Conducting Channels in Insulating Oxides Building on the recent discovery of a highly mobile two-dimensional electron gas at the interface between two insulating oxides, researchers can now generate and control a two-dimensional gas state on bare insulating oxide surfaces, a capability that may speed the future of oxide electronics. Read more... Contact: Worawat Meevasana

343

ALSNews Vol. 334  

NLE Websites -- All DOE Office Websites (Extended Search)

4 Print 4 Print Not All Nanodisk Magnetic Vortices Are Created Equally Magnetic vortices - hurricanes of magnetism only a few atoms across - have been found to form asymmetrically in ferromagnetic nanodisks. This finding contradicts previous beliefs and poses challenges to using magnetic vortices in random access memory (RAM) data storage systems. Read more... Contact: Mi-Young Im A New Route to Nanoscale Conducting Channels in Insulating Oxides Building on the recent discovery of a highly mobile two-dimensional electron gas at the interface between two insulating oxides, researchers can now generate and control a two-dimensional gas state on bare insulating oxide surfaces, a capability that may speed the future of oxide electronics. Read more... Contact: Worawat Meevasana

344

ALSNews Vol. 334  

NLE Websites -- All DOE Office Websites (Extended Search)

4 Print 4 Print Not All Nanodisk Magnetic Vortices Are Created Equally Magnetic vortices - hurricanes of magnetism only a few atoms across - have been found to form asymmetrically in ferromagnetic nanodisks. This finding contradicts previous beliefs and poses challenges to using magnetic vortices in random access memory (RAM) data storage systems. Read more... Contact: Mi-Young Im A New Route to Nanoscale Conducting Channels in Insulating Oxides Building on the recent discovery of a highly mobile two-dimensional electron gas at the interface between two insulating oxides, researchers can now generate and control a two-dimensional gas state on bare insulating oxide surfaces, a capability that may speed the future of oxide electronics. Read more... Contact: Worawat Meevasana

345

ALSNews Vol. 334  

NLE Websites -- All DOE Office Websites (Extended Search)

4 Print 4 Print Not All Nanodisk Magnetic Vortices Are Created Equally Magnetic vortices - hurricanes of magnetism only a few atoms across - have been found to form asymmetrically in ferromagnetic nanodisks. This finding contradicts previous beliefs and poses challenges to using magnetic vortices in random access memory (RAM) data storage systems. Read more... Contact: Mi-Young Im A New Route to Nanoscale Conducting Channels in Insulating Oxides Building on the recent discovery of a highly mobile two-dimensional electron gas at the interface between two insulating oxides, researchers can now generate and control a two-dimensional gas state on bare insulating oxide surfaces, a capability that may speed the future of oxide electronics. Read more... Contact: Worawat Meevasana

346

The Astrophysical Journal, 629:L65L68, 2005 August 10 2005. The American Astronomical Society. All rights reserved. Printed in U.S.A.  

E-Print Network (OSTI)

), although no naturally occurring radiation had been confirmed as TR. In an astrophysical context, TR must. All rights reserved. Printed in U.S.A. SPATIAL EVIDENCE FOR TRANSITION RADIATION IN A SOLAR RADIO and electric and magnetic fields, is of great interest in astrophysical plasmas, but occurs on spatial scales

347

E-print Network Web Log News: Research Communications for Scientists...  

NLE Websites -- All DOE Office Websites (Extended Search)

Website Policies and Important Links E-print Web Log E-print Network News E-print Network About Search Browse by Discipline Find Scientific Societies Receive E-print Alerts Contact...

348

The plasmoid instability during asymmetric inflow magnetic reconnection  

SciTech Connect

Theoretical studies of the plasmoid instability generally assume that the reconnecting magnetic fields are symmetric. We relax this assumption by performing two-dimensional resistive magnetohydrodynamic simulations of the plasmoid instability during asymmetric inflow magnetic reconnection. Magnetic asymmetry modifies the onset, scaling, and dynamics of this instability. Magnetic islands develop preferentially into the weak magnetic field upstream region. Outflow jets from individual X-points impact plasmoids obliquely rather than directly as in the symmetric case. Consequently, deposition of momentum by the outflow jets into the plasmoids is less efficient, the plasmoids develop net vorticity, and shear flow slows down secondary merging between islands. Secondary merging events have asymmetry along both the inflow and outflow directions. Downstream plasma is more turbulent in cases with magnetic asymmetry because islands are able to roll around each other after exiting the current sheet. As in the symmetric case, plasmoid formation facilitates faster reconnection for at least small and moderate magnetic asymmetries. However, when the upstream magnetic field strengths differ by a factor of 4, the reconnection rate plateaus at a lower value than expected from scaling the symmetric results. We perform a parameter study to investigate the onset of the plasmoid instability as a function of magnetic asymmetry and domain size. There exist domain sizes for which symmetric simulations are stable but asymmetric simulations are unstable, suggesting that moderate magnetic asymmetry is somewhat destabilizing. We discuss the implications for plasmoid and flux rope formation in solar eruptions, laboratory reconnection experiments, and space plasmas. The differences between symmetric and asymmetric simulations provide some hints regarding the nature of the three-dimensional plasmoid instability.

Murphy, Nicholas A. [Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138 (United States)] [Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138 (United States); Young, Aleida K. [Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138 (United States) [Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138 (United States); Department of Atmospheric, Oceanic and Space Sciences, University of Michigan, Ann Arbor, Michigan 48109 (United States); Shen, Chengcai [Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138 (United States) [Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138 (United States); Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming, Yunnan 650011 (China); Graduate School of the Chinese Academy of Sciences, Beijing 100049 (China); Lin, Jun [Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138 (United States) [Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138 (United States); Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming, Yunnan 650011 (China); Ni, Lei [Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming, Yunnan 650011 (China)] [Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming, Yunnan 650011 (China)

2013-06-15T23:59:59.000Z

349

CAN 3D PRINTING REVOLUTIONIZE GLOBAL MANUFACTURING? A DELPHI STUDY  

E-Print Network (OSTI)

CAN 3D PRINTING REVOLUTIONIZE GLOBAL MANUFACTURING? A DELPHI STUDY ­ Master Thesis Proposal ­ BACKGROUND 3D printing (or additive manufacturing) is not an entirely new phenomenon. First introduced and president of Foxconn, calls it a nice "gimmick" and even Nick Allen, founder of 3D printing company 3D Print

350

Linear chain magnetism  

Science Journals Connector (OSTI)

Linear chain magnetism ... A brief introduction to this concept, which is also called lower dimensional magnetism. ...

Richard L. Carlin

1991-01-01T23:59:59.000Z

351

Comment on “Thermal hysteresis in the normal-state magnetization of La2?xSrxCuO4”  

Science Journals Connector (OSTI)

The aim of this comment is to explain why the thermal hysteresis in magnetization is observed in La2?xSrxCuO4 (LSCO) and presumably in all cuprates but not in the BCS superconductors such as Nb or Pb. The key to understanding the hysteresis in LSCO is the localization of pairs within the CuO6 pyramids and formation of charged and magnetic stripes in the CuO2 planes. Due to the chemical equilibrium the spin system of the localized triplet pairs is disordered due to their decay into mobile fermions. The explanation in terms of normal state vortices is shown to be invalid.

J. Hissa and A. Kallio

2005-11-04T23:59:59.000Z

352

Low dimensional magnetism  

E-Print Network (OSTI)

Magnetism in Ultracold Gases 4 Magnetic phase diagram of aMagnetism . . . . . . . . . . . .1.3 Magnetism in condensedIntroduction 1 Brief introduction to magnetism 1.1 Classic

Kjall, Jonas Alexander

2012-01-01T23:59:59.000Z

353

POSTER PRINTING ON CAMPUS Now that the GRC conference is right around the corner, you can print your 2014 research  

E-Print Network (OSTI)

POSTER PRINTING ON CAMPUS Now that the GRC conference is right around the corner, you can print your 2014 research conference posters with ESRC Poster Printing Services located in Room 253 of Morse Hall. http://posters.unh.edu All posters submitted for printing through our service are eligible

354

Non-Employee Static Magnetic Field Questionnaire  

NLE Websites -- All DOE Office Websites (Extended Search)

Occupational Medicine Clinic (OMC) Occupational Medicine Clinic (OMC) Medical Questionnaire for non-BSA Workers/Students who may enter STATIC MAGNETIC FIELDS NAME:_________________ Extension__________ BNL Badge #:_____________ BNL Supervisor_____________ INSTRUCTIONS TO BSA SUPERVISOR or PRECEPTOR: Please print this form and give it to the (non-BSA employee) worker or student for completion. This individual should not give you the completed form, but should instead mail or fax it to OMC. INSTRUCTIONS TO WORKER or STUDENT: The purpose of this questionnaire is to provide the OMC physician at BNL with information about any medical devices or conditions you may have that might affect your ability to safely enter a strong magnetic field, in order to determine whether you can be medically cleared to enter such a field.

355

Magnetic Viscosity  

Science Journals Connector (OSTI)

1 January 1893 research-article Magnetic Viscosity J. Hopkinson E. Wilson F. Lydall The Royal Society is collaborating with JSTOR to digitize, preserve, and extend access to Proceedings of the Royal Society of London. www.jstor.org

1893-01-01T23:59:59.000Z

356

Rock magnetism  

Science Journals Connector (OSTI)

The past three decades have witnessed a new paradigm, the plate tectonics paradigm, in Earth sciences. The record of the Earth's magnetic field stored in rocks played a major role in the establishment of this par...

Ronald T. Merrill

1989-01-01T23:59:59.000Z

357

Learning About Magnets!  

NLE Websites -- All DOE Office Websites (Extended Search)

the the National High Magnetic Field Laboratory Learning About Name A magnet is a material or object that creates a magnetic fi eld. This fi eld is invisible, but it creates a force that can "attract" or "repel" other magnets and magnetic materials, like iron or nickel. What is a Magnet? This bar magnet is a permanent magnet. Permanent magnets can be found in the Earth as rocks and metals. Magnets have

358

Controlling Magnetism at the Nanoscale  

E-Print Network (OSTI)

Manipulation of Magnetism - External148 Conclusion A The Magnetism Cheat Sheet A.1 Magnetic157 A.2 Magnetism Unit Conversion

Wong, Jared

2012-01-01T23:59:59.000Z

359

Conditional averaging on volumetric velocity fields for analysis of the pseudo-periodic organization of jet-in-crossflow vortices  

E-Print Network (OSTI)

Volumetric velocimetry measurements have been performed on a round jet in crossflow (JICF). Two kind of conditional averaging process are presented : a global conditional average (GCA) and a local conditional average (LCA). Vortices crossing the JICF symmetry plane are used to quantify the jet pseudo-periodicity leading to the GCA and LCA definitions. Because they make possible to improve the velocity field resolution as well as to significantly reduce the experimental noise, these conditional averages are an interesting and efficient way to study the instantaneous swirling structures of this instantaneous flow.

Cambonie, Tristan

2014-01-01T23:59:59.000Z

360

Neutrino magnetic moment in a magnetized plasma  

E-Print Network (OSTI)

The contribution of a magnetized plasma to the neutrino magnetic moment is calculated. It is shown that only part of the additional neutrino energy in magnetized plasma connecting with its spin and magnetic field strength defines the neutrino magnetic moment. It is found that the presence of magnetized plasma does not lead to the considerable increase of the neutrino magnetic moment in contrast to the results presented in literature previously.

N. V. Mikheev; E. N. Narynskaya

2010-11-08T23:59:59.000Z

Note: This page contains sample records for the topic "magnetic vortices print" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation  

NLE Websites -- All DOE Office Websites (Extended Search)

X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation Print X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation Print Magnetic thin-film nanostructures can exhibit a magnetic vortex state in which the magnetization vectors lie in the film plane and curl around in a closed loop. At the very center of the vortex, a small, stable core exists where the magnetization points either up or down out of the plane. Three years ago, the discovery of an easy core reversal mechanism at the ALS not only made the possibility of using such systems as magnetic memories much more realistic, it also initiated investigation of the core switching mechanism itself. Now, a Belgian-German-ALS collaboration has used high-resolution, time-resolved, magnetic x-ray microscopy to experimentally reveal the first step of the reversal process: the dynamic deformation of the vortex core. The group also measured a critical vortex velocity above which reversal occurs. Both these observations provide the first experimental support for the postulated reversal mechanism.

362

X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation  

NLE Websites -- All DOE Office Websites (Extended Search)

X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation Print X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation Print Magnetic thin-film nanostructures can exhibit a magnetic vortex state in which the magnetization vectors lie in the film plane and curl around in a closed loop. At the very center of the vortex, a small, stable core exists where the magnetization points either up or down out of the plane. Three years ago, the discovery of an easy core reversal mechanism at the ALS not only made the possibility of using such systems as magnetic memories much more realistic, it also initiated investigation of the core switching mechanism itself. Now, a Belgian-German-ALS collaboration has used high-resolution, time-resolved, magnetic x-ray microscopy to experimentally reveal the first step of the reversal process: the dynamic deformation of the vortex core. The group also measured a critical vortex velocity above which reversal occurs. Both these observations provide the first experimental support for the postulated reversal mechanism.

363

X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation  

NLE Websites -- All DOE Office Websites (Extended Search)

X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation Print X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation Print Magnetic thin-film nanostructures can exhibit a magnetic vortex state in which the magnetization vectors lie in the film plane and curl around in a closed loop. At the very center of the vortex, a small, stable core exists where the magnetization points either up or down out of the plane. Three years ago, the discovery of an easy core reversal mechanism at the ALS not only made the possibility of using such systems as magnetic memories much more realistic, it also initiated investigation of the core switching mechanism itself. Now, a Belgian-German-ALS collaboration has used high-resolution, time-resolved, magnetic x-ray microscopy to experimentally reveal the first step of the reversal process: the dynamic deformation of the vortex core. The group also measured a critical vortex velocity above which reversal occurs. Both these observations provide the first experimental support for the postulated reversal mechanism.

364

X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation  

NLE Websites -- All DOE Office Websites (Extended Search)

X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation Print X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation Print Magnetic thin-film nanostructures can exhibit a magnetic vortex state in which the magnetization vectors lie in the film plane and curl around in a closed loop. At the very center of the vortex, a small, stable core exists where the magnetization points either up or down out of the plane. Three years ago, the discovery of an easy core reversal mechanism at the ALS not only made the possibility of using such systems as magnetic memories much more realistic, it also initiated investigation of the core switching mechanism itself. Now, a Belgian-German-ALS collaboration has used high-resolution, time-resolved, magnetic x-ray microscopy to experimentally reveal the first step of the reversal process: the dynamic deformation of the vortex core. The group also measured a critical vortex velocity above which reversal occurs. Both these observations provide the first experimental support for the postulated reversal mechanism.

365

X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation  

NLE Websites -- All DOE Office Websites (Extended Search)

X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation Print X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation Print Magnetic thin-film nanostructures can exhibit a magnetic vortex state in which the magnetization vectors lie in the film plane and curl around in a closed loop. At the very center of the vortex, a small, stable core exists where the magnetization points either up or down out of the plane. Three years ago, the discovery of an easy core reversal mechanism at the ALS not only made the possibility of using such systems as magnetic memories much more realistic, it also initiated investigation of the core switching mechanism itself. Now, a Belgian-German-ALS collaboration has used high-resolution, time-resolved, magnetic x-ray microscopy to experimentally reveal the first step of the reversal process: the dynamic deformation of the vortex core. The group also measured a critical vortex velocity above which reversal occurs. Both these observations provide the first experimental support for the postulated reversal mechanism.

366

X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation  

NLE Websites -- All DOE Office Websites (Extended Search)

X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation Print X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation Print Magnetic thin-film nanostructures can exhibit a magnetic vortex state in which the magnetization vectors lie in the film plane and curl around in a closed loop. At the very center of the vortex, a small, stable core exists where the magnetization points either up or down out of the plane. Three years ago, the discovery of an easy core reversal mechanism at the ALS not only made the possibility of using such systems as magnetic memories much more realistic, it also initiated investigation of the core switching mechanism itself. Now, a Belgian-German-ALS collaboration has used high-resolution, time-resolved, magnetic x-ray microscopy to experimentally reveal the first step of the reversal process: the dynamic deformation of the vortex core. The group also measured a critical vortex velocity above which reversal occurs. Both these observations provide the first experimental support for the postulated reversal mechanism.

367

Thermodynamic Critical Field and Superconducting Fluctuation of Vortices for High Temperature Cuprate Superconductor: La-214  

SciTech Connect

Thermodynamics has been studied systematically for the high temperature cuprate superconductor La{sub 2-x}Sr{sub x}CuO{sub 4-{delta}}, La-214, in the entire superconductive region from strongly underdoped to strongly overdoped regimes. Magnetization studies with H{parallel}c have been made in order to investigate the changes in free energy of the system as the number of carriers is reduced. Above the superconducting transition temperature, the normal-state magnetization exhibits a two-dimensional Heisenberg antiferromagnetic behavior. Below T{sub c}, magnetization data are thermodynamically reversible over large portions of the H-T plane, so the free energy is well defined in these regions. As the Sr concentration is varied over the wide range from 0.060 (strongly underdoped) to 0.234 (strongly overdoped), the free energy change goes through a maximum at the optimum doped in a manner similar to the T{sub c0} vs. x curve. The density of states, N(0), remains nearly constant in the overdoped and optimum doped regimes, taking a broad maximum around x = 0.188, and then drops abruptly towards zero in the underdoped regime. The La{sub 2-x}Sr{sub x}CuO{sub 4} (La-214) system displays the fluctuating vortex behavior with the characteristic of either 2D or 3D fluctuations as indicated by clearly identifiable crossing points T* close to T{sub c}. The dimensional character of the fluctuations depends on both applied magnetic fields and the density of charge carriers. The dimensional crossover from 2D to 3D occurs in the strongly underdoped regime when the c-axis coherence distance {zeta}{sub c} becomes comparable to the spacing between adjacent CuO{sub 2} layers s at sufficiently high magnetic fields near H{sub c2}.

Yung Moo Huh

2001-05-01T23:59:59.000Z

368

Thermodynamic Critical Field and Superconducting Fluctuation of Vortices for High Temperature Cuprate Superconductor: La-214  

SciTech Connect

Thermodynamics has been studied systematically for the high temperature cuprate superconductor La{sub 2-x}Sr{sub x}CuO{sub 4-{delta}}, La-214, in the entire superconductive region from strongly underdoped to strongly overdoped regimes. Magnetization studies with H {parallel} c have been made in order to investigate the changes in free energy of the system as the number of carriers is reduced. Above the superconducting transition temperature, the normal-state magnetization exhibits a two-dimensional Heisenberg antiferromagnetic behavior. Below T{sub c}, magnetization data are thermodynamically reversible over large portions of the H-T plane, so the free energy is well defined in these regions. As the Sr concentration is varied over the wide range from 0.060 (strongly underdoped) to 0.234 (strongly overdoped), the free energy change goes through a maximum at the optimum doped in a manner similar to the T{sub c0} vs. x curve. The density of states, N(0), remains nearly constant in the overdoped and optimum doped regimes, taking a broad maximum around x = 0.188, and then drops abruptly towards zero in the underdoped regime. The La{sub 2-x}Sr{sub x}CuO{sub 4} (La-214) system displays the fluctuating vortex behavior with the characteristic of either 2D or 3D fluctuations as indicated by clearly identifiable crossing points T* close to T{sub c}. The dimensional character of the fluctuations depends on both applied magnetic fields and the density of charge carriers. The dimensional crossover from 2D to 3D occurs in the strongly underdoped regime when the c-axis coherence distance {xi}{sub c} becomes comparable to the spacing between adjacent CuO{sub 2} layers s at sufficiently high magnetic field near H{sub c2}.

Douglas K. Finnemore

2001-06-25T23:59:59.000Z

369

Poster Printing on Esmeralda GENERAL INFORMATION  

E-Print Network (OSTI)

Poster Printing on Esmeralda 6.18.14 GENERAL INFORMATION · Location o The poster printer is located. · Time: o A print job per poster takes between 8 to 15 minutes to complete. · Reservation: o Printer · Important: o Please do not change the paper or ink on the poster by yourself. Please contact support

Ahlers, Guenter

370

Poster Printing Tips Systems Biodynamics Lab, UCSD  

E-Print Network (OSTI)

Poster Printing Tips Systems Biodynamics Lab, UCSD Revision 1.0 Wyming Lee Pang February 28, 2006 #12;Poster Printing Tips Rev. 1.0, WLP · DO NOT use Microsoft Powerpoint. Although the status quo for making posters, the initial benefits in ease of use and application familiarity will be far overshadowed

Hasty, Jeff

371

VOLUME 77, NUMBER 20 P H Y S I C A L R E V I E W L E T T E R S 11 NOVEMBER 1996 One-Dimensional Localization of Quantum Vortices in Disordered Josephson Junction Arrays  

E-Print Network (OSTI)

-Dimensional Localization of Quantum Vortices in Disordered Josephson Junction Arrays Alexander van Oudenaarden, S. J. K-dimensional arrays of Josephson junctions was studied experimentally. The vortices localize in disordered arrays of Josephson junctions. The great advantage of these systems is that disorder can be introduced in a very

van Oudenaarden, Alexander

372

Petroglyphs, Lighting, and Magnetism  

E-Print Network (OSTI)

1950 Electricity and Magnetism: Theory and Applications.I Petroglyphs, Lightning, and Magnetism | Walker Figure 8.I Petroglyphs, Lightning, and Magnetism | Walker Figure IL

Walker, Merle F

2007-01-01T23:59:59.000Z

373

E-print Network Alert Service  

Office of Scientific and Technical Information (OSTI)

E-print Web Log E-print Web Log alert image About Search Browse by Discipline Find Scientific Societies Receive E-print Alerts Contact Us Help Home Site Map OSTI DOE Welcome to E-print Alerts! This feature can be used to automatically keep abreast of the latest e-prints posted on ArXiv databases as well as a number of other science and engineering databases and Web sites, based on a search profile you submit to us. You can even receive new postings from a number of sites by submitting a single profile based on your specific area of interest. The Service is free, and you can create as many profiles as you wish. Simply register for the Service and create your search strategies for your profiles. This will be run against all selected databases and Web sites, and you will receive a weekly Alert via e-mail with the results of your automatic profile search.

374

Fiber reinforcement during 3D printing  

Science Journals Connector (OSTI)

Abstract Three-dimensional (3D) printing is an attractive rapid prototyping technology for the fabrication of 3D structures by the localized deposition of a reactive binder liquid onto thin powder layers in predominantly technical applications. A practical limitation is often the low green strength of printed samples, which can lead to a collapse of large and fragile structures during removal from the powder bed and the following depowdering procedure. Fibre reinforcement may improve green mechanical properties of printed samples, which was investigated in this study using a range of different short fibres added to a matrix of cellulose-modified gypsum powder. Mechanical testing of printed samples revealed a bending strength increase of 180% and up to 10 times higher work of fracture values compared to non-reinforced printed samples.

Susanne Christ; Martin Schnabel; Elke Vorndran; Jürgen Groll; Uwe Gbureck

2015-01-01T23:59:59.000Z

375

Effective world-sheet theory of color magnetic flux tubes in dense QCD  

SciTech Connect

Color magnetic flux tubes appear in the color-flavor locked phase of high density QCD, which exhibits color superconductivity as well as superfluidity. They are non-Abelian superfluid vortices and are accompanied by orientational zero modes in the internal space associated with the color-flavor locked symmetry spontaneously broken in the presence of the vortex. We show that those zero modes are localized around the vortex in spite of the logarithmic divergence of its tension and derive the low-energy effective theory of them on the world sheet of the vortex string.

Eto, Minoru [Theoretical Physics Laboratory, RIKEN, Saitama 351-0198 (Japan); Nakano, Eiji [Extreme Matter Institute, GSI, Planckstrasse 1, D-64291 Darmstadt (Germany); Nitta, Muneto [Department of Physics, and Research and Education Center for Natural Sciences, Keio University, 4-1-1 Hiyoshi, Yokohama, Kanagawa 223-8521 (Japan)

2009-12-15T23:59:59.000Z

376

Color Magnetic Flux Tubes in Dense QCD. II: Effective World-Sheet Theory  

E-Print Network (OSTI)

Color magnetic flux tubes appear in the color-flavor locked phase of high density QCD, which exhibits color superconductivity as well as superfluidity. They are non-Abelian superfluid vortices and are accompanied by orientational zero modes in the internal space associated with the color-flavor locked symmetry spontaneously broken in the presence of the vortex. We show that those zero modes are localized around the vortex in spite of the logarithmic divergence of its tension, and derive the low-energy effective theory of them on the world-sheet of the vortex-string.

Minoru Eto; Eiji Nakano; Muneto Nitta

2009-08-31T23:59:59.000Z

377

Color Magnetic Flux Tubes in Dense QCD. II: Effective World-Sheet Theory  

E-Print Network (OSTI)

Color magnetic flux tubes appear in the color-flavor locked phase of high density QCD, which exhibits color superconductivity as well as superfluidity. They are non-Abelian superfluid vortices and are accompanied by orientational zero modes in the internal space associated with the color-flavor locked symmetry spontaneously broken in the presence of the vortex. We show that those zero modes are localized around the vortex in spite of the logarithmic divergence of its tension, and derive the low-energy effective theory of them on the world-sheet of the vortex-string.

Eto, Minoru; Nitta, Muneto

2009-01-01T23:59:59.000Z

378

Kelvin-Helmholtz instability in a current-vortex sheet at a 3D magnetic null  

SciTech Connect

We report here, for the first time, an observed instability of a Kelvin-Helmholtz nature occurring in a fully three-dimensional (3D) current-vortex sheet at the fan plane of a 3D magnetic null point. The current-vortex layer forms self-consistently in response to foot point driving around the spine lines of the null. The layer first becomes unstable at an intermediate distance from the null point, with the instability being characterized by a rippling of the fan surface and a filamentation of the current density and vorticity in the shear layer. Owing to the 3D geometry of the shear layer, a branching of the current filaments and vortices is observed. The instability results in a mixing of plasma between the two topologically distinct regions of magnetic flux on either side of the fan separatrix surface, as flux is reconnected across this surface. We make a preliminary investigation of the scaling of the system with the dissipation parameters. Our results indicate that the fan plane separatrix surface is an ideal candidate for the formation of current-vortex sheets in complex magnetic fields and, therefore, the enhanced heating and connectivity change associated with the instabilities of such layers.

Wyper, P. F. [School of Mathematics and Statistics, University of Sheffield, Sheffield S3 7RH (United Kingdom); Pontin, D. I. [Division of Mathematics, University of Dundee, Dundee DD1 4HN (United Kingdom)

2013-03-15T23:59:59.000Z

379

Plasma resonance at low magnetic fields as a probe of vortex line meandering in layered superconductors  

Science Journals Connector (OSTI)

We consider the magnetic-field dependence of the plasma resonance frequency in pristine and in irradiated Bi2Sr2CaCu2O8 crystals near Tc. At low magnetic fields we relate linear in field corrections to the plasma frequency to the average distance between the pancake vortices in the neighboring layers (wandering length). We calculate the wandering length in the case of thermal wiggling of vortex lines, taking into account both Josephson and magnetic interlayer coupling of pancakes. Analyzing experimental data, we found that (i) the wandering length becomes comparable with the London penetration depth near Tc and (ii) at small melting fields (line liquid phase in this field range. We also found that pinning by columnar defects affects weakly the field dependence of the plasma resonance frequency near Tc.

L. N. Bulaevskii; A. E. Koshelev; V. M. Vinokur; M. P. Maley

2000-02-01T23:59:59.000Z

380

Plasma resonance at low magnetic fields as a probe of vortex line meandering in layered superconductors  

E-Print Network (OSTI)

We consider the magnetic field dependence of the plasma resonance frequency in pristine and in irradiated Bi$_2$Sr$_2$CaCu$_2$O$_8$ crystals near $T_c$. At low magnetic fields we relate linear in field corrections to the plasma frequency to the average distance between the pancake vortices in the neighboring layers (wandering length). We calculate the wandering length in the case of thermal wiggling of vortex lines, taking into account both Josephson and magnetic interlayer coupling of pancakes. Analyzing experimental data, we found that (i) the wandering length becomes comparable with the London penetration depth near T$_{c}$ and (ii) at small melting fields ($line liquid phase in this field range. We also found that pinning by columnar defects affects weakly the field dependence of the plasma resonance frequency near $T_c$.

L. N. Bulaevskii; A. E. Koshelev; V. M. Vinokur; M. P. Maley

1999-07-29T23:59:59.000Z

Note: This page contains sample records for the topic "magnetic vortices print" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Josephson junction of non-Abelian superconductors and non-Abelian Josephson vortices  

E-Print Network (OSTI)

A Josephson junction is made of two superconductors sandwiching an insulator, and a Josephson vortex is a magnetic vortex absorbed into the Josephson junction, whose dynamics can be described by the sine-Gordon equation. In a field theory framework, a flexible Josephson junction was proposed, in which the Josephson junction is represented by a domain wall separating two condensations and a Josephson vortex is a sine-Gordon soliton in the domain wall effective theory. In this paper, we propose a Josephson junction of non-Abelian color superconductors, that is described by a non-Abelian domain wall, and show that a non-Abelian vortex (color magnetic flux tube) absorbed into it is a non-Abelian Josephson vortex represented as a non-Abelian sine-Gordon soliton in the domain wall effective theory.

Muneto Nitta

2015-02-09T23:59:59.000Z

382

Josephson junction of non-Abelian superconductors and non-Abelian Josephson vortices  

E-Print Network (OSTI)

A Josephson junction is made of two superconductors sandwiching an insulator, and a Josephson vortex is a magnetic vortex absorbed into the Josephson junction, whose dynamics can be described by the sine-Gordon equation. In a field theory framework, a flexible Josephson junction was proposed, in which the Josephson junction is represented by a domain wall separating two condensations and a Josephson vortex is a sine-Gordon soliton in the domain wall effective theory. In this paper, we propose a Josephson junction of non-Abelian color superconductors, that is described by a non-Abelian domain wall, and show that a non-Abelian vortex (color magnetic flux tube) absorbed into it is a non-Abelian Josephson vortex represented as a non-Abelian sine-Gordon soliton in the domain wall effective theory.

Nitta, Muneto

2015-01-01T23:59:59.000Z

383

Add your e-prints to the E-print Network -- Energy, science, and technology  

Office of Scientific and Technical Information (OSTI)

Add E-prints Add E-prints We invite you to submit your e-prints to the network. Having your e-prints in the network increases awareness of them and promotes the dissemination of your information to a broader audience. We do not add all submitted e-prints to our collection, and we cannot make any predictions or guarantees about when or if they will appear. See "What are the criteria for inclusion in the E-print Network?" Please enter your full URL, including the http:// prefix. For example: http://www.osti.gov/eprints/. You may also add comments or keywords that describe the content of your page. These are used only for our information and do not affect how your page is indexed or used. Label ID URL (required): Title (required): E-mail address (required): Your Name:

384

Magnetic Catalysis vs Magnetic Inhibition  

E-Print Network (OSTI)

We discuss the fate of chiral symmetry in an extremely strong magnetic field B. We investigate not only quark fluctuations but also neutral meson effects. The former would enhance the chiral-symmetry breaking at finite B according to the Magnetic Catalysis, while the latter would suppress the chiral condensate once B exceeds the scale of the hadron structure. Using a chiral model we demonstrate how neutral mesons are subject to the dimensional reduction and the low dimensionality favors the chiral-symmetric phase. We point out that this effect, the Magnetic Inhibition, can be a feasible explanation for recent lattice-QCD data indicating the decreasing behavior of the chiral-restoration temperature with increasing B.

Kenji Fukushima; Yoshimasa Hidaka

2012-09-06T23:59:59.000Z

385

Magnetic Stereoscopy  

E-Print Network (OSTI)

The space mission STEREO will provide images from two viewpoints. An important aim of the STEREO mission is to get a 3D view of the solar corona. We develop a program for the stereoscopic reconstruction of 3D coronal loops from images taken with the two STEREO spacecraft. A pure geometric triangulation of coronal features leads to ambiguities because the dilute plasma emissions complicates the association of features in image 1 with features in image 2. As a consequence of these problems the stereoscopic reconstruction is not unique and multiple solutions occur. We demonstrate how these ambiguities can be resolved with the help of different coronal magnetic field models (potential, linear and non-linear force-free fields). The idea is that, due to the high conductivity in the coronal plasma, the emitting plasma outlines the magnetic field lines. Consequently the 3D coronal magnetic field provides a proxy for the stereoscopy which allows to eliminate inconsistent configurations. The combination of stereoscopy and magnetic modelling is more powerful than one of these tools alone. We test our method with the help of a model active region and plan to apply it to the solar case as soon as STEREO data become available.

Thomas Wiegelmann; Bernd Inhester

2006-12-21T23:59:59.000Z

386

3D Printed Shelby Cobra  

Energy.gov (U.S. Department of Energy (DOE))

ORNL's newly printed 3D car will be showcased at the 2015 NAIAS in Detroit. This "laboratory on wheels" uses the Shelby Cobra design, celebrating the 50th anniversary of this model and honoring the first vehicle to be voted a national monument. The Shelby will allow research and development of integrated components to be tested and enhanced in real time, improving the use of sustainable, digital manufacturing solutions in the automotive industry.

387

The dynamics of the gradient of potential vorticity This article has been downloaded from IOPscience. Please scroll down to see the full text article.  

E-Print Network (OSTI)

frozen into the flow. Figure 1 shows (model assimilated) satellite data for contours of potential Fast Track Communication Figure 1. A typical snapshot of satellite data taken every 6 h of the Northern to satellite observations of potential vorticity and potential temperature at the tropopause. PACS numbers: 47

Gibbon, J. D.

388

One-dimensional Mott localization of quantum vortices in Josephson-junction arrays A. van Oudenaarden, B. van Leeuwen, M. P. M. Robbens, and J. E. Mooij  

E-Print Network (OSTI)

One-dimensional Mott localization of quantum vortices in Josephson-junction arrays A. van long and narrow arrays of small Josephson junctions is studied experimentally. We investigate for electrons and a superfluid phase for bosons. One- dimensional Josephson-junction arrays are very suitable

van Oudenaarden, Alexander

389

magnets2  

NLE Websites -- All DOE Office Websites (Extended Search)

II II Painless Physics Articles BEAM COOLING August 2, 1996 By Leila Belkora, Office of Public Affairs ACCELERATION August 16, 1996 By Dave Finley, Accelerator Division Head RF August 30, 1996 By Pat Colestock, Accelerator Division FIXED TARGET PHYSICS September 20, 1996 By Peter H. Garbincius, Physics Section FIXED TARGET PHYSICS PART DEUX October 16, 1996 By Peter H. Garbincius, Physics Section and Leila Belkora, Office of Public Affaris CROSS SECTION November 1, 1996 By Doreen Wackeroth, Theoretical Physics Edited by Leila Belkora, Office of Public Affaris MAGNETS PART I November 15, 1996 By Hank Glass, Technical Support Section Edited by Donald Sena, Office of Public Affairs MAGNETS PART II January 10, 1997 By Hank Glass, Technical Support Section Edited by Donald Sena, Office of Public Affairs

390

The Astrophysical Journal, 692:15431560, 2009 February 20 doi:10.1088/0004-637X/692/2/1543 c 2009. The American Astronomical Society. All rights reserved. Printed in the U.S.A.  

E-Print Network (OSTI)

. The American Astronomical Society. All rights reserved. Printed in the U.S.A. VECTOR MAGNETIC FIELDS using the Imaging Vector Magnetograph (IVM) at Mees Solar Observatory. Two IVM effects are newly discussed and taken into account: (1) the central wavelength of the Fabry­P´erot is found to drift with time

Li, Jing

391

Magnetic Reconnection  

SciTech Connect

We review the fundamental physics of magnetic reconnection in laboratory and space plasmas, by discussing results from theory, numerical simulations, observations from space satellites, and the recent results from laboratory plasma experiments. After a brief review of the well-known early work, we discuss representative recent experimental and theoretical work and attempt to interpret the essence of significant modern findings. In the area of local reconnection physics, many significant findings have been made with regard to two- uid physics and are related to the cause of fast reconnection. Profiles of the neutral sheet, Hall currents, and the effects of guide field, collisions, and micro-turbulence are discussed to understand the fundamental processes in a local reconnection layer both in space and laboratory plasmas. While the understanding of the global reconnection dynamics is less developed, notable findings have been made on this issue through detailed documentation of magnetic self-organization phenomena in fusion plasmas. Application of magnetic reconnection physics to astrophysical plasmas is also brie y discussed.

Masaaki Yamada, Russell Kulsrud and Hantao Ji

2009-09-17T23:59:59.000Z

392

E-print Network: Research Communications for Scientists and Engineers  

Office of Scientific and Technical Information (OSTI)

E-print Web Log E-print Web Log E-print Network E-print Network About Search Browse by Discipline Find Scientific Societies Receive E-print Alerts Contact Us Help Home Site Map OSTI DOE For Immediate Release January 10, 2005 For more information, contact: Alison Buckholtz, SPARC, alison@arl.org Susan Tackett, OSTI, tacketts@osti.gov DOE/OSTI's E-PRINT NETWORK SELECTED AS SPARC PARTNER Provides Research Communications and Full-Text Searching of Science Websites and Databases Washington, DC -SPARC (the Scholarly Publishing and Academic Resources Coalition) today announced that the E-print Network, a free service of the U.S. Department of Energy (DOE) Office of Scientific and Technical Information (OSTI), has been chosen as a SPARC Scientific Communities partner. The selection recognizes the contribution of the E-print Network to expanded availability and use of open-access scientific and technical research on the Internet.

393

Browse by Discipline -- E-print Network Subject Pathways: Biology...  

NLE Websites -- All DOE Office Websites (Extended Search)

Home About Advanced Search Browse by Discipline Scientific Societies E-print Alerts Add E-prints FAQ * HELP * SITE MAP * CONTACT US Enter Search Terms Search Advanced Search...

394

Browse by Discipline -- E-print Network Subject Pathways: Plasma...  

NLE Websites -- All DOE Office Websites (Extended Search)

Home About Advanced Search Browse by Discipline Scientific Societies E-print Alerts Add E-prints FAQ * HELP * SITE MAP * CONTACT US Enter Search Terms Search Advanced Search...

395

3D printing: a valuable resource in human anatomy education  

Science Journals Connector (OSTI)

In addition to known methods such as plastination and Thiel method embalming, a new three-dimensional printing system (3D printing) has been developed recently—an innovative approach...

Mauro Vaccarezza; Veronica Papa

2014-10-01T23:59:59.000Z

396

Ames Laboratory 3D printing technology research taking shape...  

NLE Websites -- All DOE Office Websites (Extended Search)

3D printing technology research taking shape Insider Scientists at the U.S. Department of Energy's Ames Laboratory see amazing potential in 3D printing and additive manufacturing,...

397

HOME NEWS print email Family Owned Business Awards  

E-Print Network (OSTI)

HOME NEWS print email Family Owned Business Awards MEDIHA DIMARTINO Wednesday, November 13, 2013 will be profiled in the Business Journal's print edition of Nov. 25 ARCHIVE Cable Business Journal Videocast HOME

de Lijser, Peter

398

Three-dimensionally printed biological machines powered by skeletal muscle  

E-Print Network (OSTI)

in animals, as a con- tractile power source. Here, we report the development of 3D printed hydrogel "bio-bots were optimized using stereolithographic 3D printing, and the ef- fect of collagen I and fibrin

Bashir, Rashid

399

Browse by Discipline -- E-print Network Subject Pathways: Power...  

NLE Websites -- All DOE Office Websites (Extended Search)

Home About Advanced Search Browse by Discipline Scientific Societies E-print Alerts Add E-prints FAQ * HELP * SITE MAP * CONTACT US Enter Search Terms Search Advanced Search...

400

3D printing and simulation of naturally randomized cellular automata  

Science Journals Connector (OSTI)

3D printing technology usually aims at reproducing objects deterministically ... tools; however, the author has discovered that 3D printing can also generate self-organizing patterns similar ... proposed method w...

Yasusi Kanada

2014-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "magnetic vortices print" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

3D Printing Comes of Age | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

3D Printing Comes of Age 3D Printing Comes of Age September 19, 2014 - 5:25pm Addthis The highlight of this year's International Manufacturing Technology Show (IMTS), held earlier...

402

Gas cushion control of OVJP print head position  

DOE Patents (OSTI)

An OVJP apparatus and method for applying organic vapor or other flowable material to a substrate using a printing head mechanism in which the print head spacing from the substrate is controllable using a cushion of air or other gas applied between the print head and substrate. The print head is mounted for translational movement towards and away from the substrate and is biased toward the substrate by springs or other means. A gas cushion feed assembly supplies a gas under pressure between the print head and substrate which opposes the biasing of the print head toward the substrate so as to form a space between the print head and substrate. By controlling the pressure of gas supplied, the print head separation from the substrate can be precisely controlled.

Forrest, Stephen R

2014-10-07T23:59:59.000Z

403

Characterizing tensile loading responses of 3D printed samples  

E-Print Network (OSTI)

An experimental study was performed to characterize the loading response of samples manufactured through 3D printing. Tensile testing was performed on a number of 3D printed samples created through Fused Filament Fabrication ...

Haid, Christopher M

2014-01-01T23:59:59.000Z

404

PIA - Savannah River Operations Office File and Print Services...  

NLE Websites -- All DOE Office Websites (Extended Search)

and Print Services More Documents & Publications PIA - Bonneville Power Adminstration Ethics Helpline Integrated Safety Management Workshop Registration, PIA, Idaho National...

405

Magnetic Reconnection in Astrophysical and  

E-Print Network (OSTI)

Magnetic Reconnection in Astrophysical and Laboratory Plasmas Ellen G. Zweibel1 and Masaaki Yamada2 astrophysics, magnetic fields, magnetic reconnection Abstract Magnetic reconnection is a topological rearrangement of magnetic field that converts magnetic energy to plasma energy. Astrophysical flares, from

406

A QuickStart Guide to printing a  

E-Print Network (OSTI)

A QuickStart Guide to printing a 3D model starting from a block of bytes Bridget CarragherStart Guide to printing a 3D model starting from a block of bytes This is currently a three step process. (1 and selecting a new size (of 3 inches for example). Once you have done this, choose Print from the File menu

407

Three-Dimensional Printing Fiber Reinforced Hydrogel Composites  

Science Journals Connector (OSTI)

An additive manufacturing process that combines digital modeling and 3D printing was used to prepare fiber reinforced hydrogels in a single-step process. ... 3D printing; alginate/polyacrylamide hydrogel; artificial meniscus; composite hydrogel; rule of mixtures ... (1) An advantage of 3D printing over other additive fabrication technologies is that multiple materials can be incorporated into a single build. ...

Shannon E. Bakarich; Robert Gorkin; III; Marc in het Panhuis; Geoffrey M. Spinks

2014-09-08T23:59:59.000Z

408

3D Printing of Functional and Biological Materials  

E-Print Network (OSTI)

! 3D Printing of Functional and Biological Materials Jennifer A. Lewis Wyss Professor)! Multimaterial 3D printing ! #12;3D antennas! Li ion microbatteries! Lightweight microlattices!Flexible sensors! 3D Printing of Integrated Electronic Devices ! #12;20 nm average , 5 ­ 50 nm

409

Field Facilities Contacts for Printing and Mail  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Facilities Contacts for Printing and Mail Facilities Contacts for Printing and Mail Print and Mail Contacts Site Printing Contact Mail Contact NNSA, Albuquerque Deborah Miller (505) 845-6049 Thomas H. Clinkenbeard NNSA Service Center PO Box 5400 Albuquerque, NM 87185-5400 (505) 845-4602 tclinkenbeard@doeal.gov (mailto:tclinkenbeard@doeal.gov) Argonne National Laboratory Doreen Schoening Argonne National Laboratory U.S. Department of Energy 9700 South Cass Avenue Blvd 340 Lemonmt, IL 60439 (630) 840-6399 dschoening@anl.gov (mailto:dschoening@anl.gov) Bechtel Jacobs James Hughes Bechtel Jacobs - Mail Stop 7294 U.S. Department of Energy PO Box 4699 Oak Ridge, TN 37831 (865) 576-8423 Berkeley Site Office Mercedes Downing Berkeley Site Office U.S. Department of Energy 1 Cyclotron Road Bldg 90

410

Printed diodes operating at mobile phone frequencies  

Science Journals Connector (OSTI)

...diagnostic devices, and rollable solar cells, to cite a few (6, 7...electronics Printed electronics Advantage or disadvantage High performance Low performance...including that of extracting energy from an electromagnetic field...

Antonio Facchetti

2014-01-01T23:59:59.000Z

411

Impedance tube measurements of printed porous materials  

Science Journals Connector (OSTI)

An impedance tube has been used to make measurements of the acoustic impedance of porous samples. Porous with designed porosities and tortuosities have been produced using 3D printing. Measured impedances are compared to calculated values.

Carl Frederickson

2014-01-01T23:59:59.000Z

412

Multiple frequency printed slot and dipole antennas  

E-Print Network (OSTI)

combination of integrating solid-state devices on the same substrate as the antenna makes printed circuit antennas highly attractive. An improved less rigorous transmission line model is used to analyze microstrip-fed transverse slot antennas. Adding a...

Kolsrud, Arild

2012-06-07T23:59:59.000Z

413

Plasma etchback of multilayer printed wiring boards  

SciTech Connect

Removal of epoxy smear and glass fiber protrusions in multilayer printed wiring board holes was investigated. Gas plasma techniques, using a mixture of carbon tetrafluoride and oxygen, removed the eposies; however, the glass fibers were not affected.

Gentry, F.L.

1980-06-01T23:59:59.000Z

414

printed on recycled paper INDUSTRIAL ASSESSMENT CENTER  

E-Print Network (OSTI)

printed on recycled paper INDUSTRIAL ASSESSMENT CENTER ENERGY EFFICIENCY, POLLUTION PREVENTION ASSESSMENT REPORT FOR ENERGY EFFICIENCY, POLLUTION PREVENTION, AND PRODUCTIVITY IMPROVEMENT No. CO0999 ASSESSMENT DATE: February 29, 2000 LOCATION: ______, Colorado PRINCIPAL PRODUCTS: Injection molded plastic

415

National High Magnetic Field Laboratory Audio Dictionary: Magnetic...  

NLE Websites -- All DOE Office Websites (Extended Search)

Links Magnets from Mini to Mighty Meet the Magnets How to Make an Electromagnet (audio slideshow) Compasses in Magnetic Fields (interactive tutorial) Magnetic Field Around a...

416

Spinning a New Type of Magnetic Field | U.S. DOE Office of Science (SC)  

NLE Websites -- All DOE Office Websites (Extended Search)

Spinning a New Type of Magnetic Field Spinning a New Type of Magnetic Field Basic Energy Sciences (BES) BES Home About Research Facilities Science Highlights Benefits of BES Funding Opportunities Basic Energy Sciences Advisory Committee (BESAC) News & Resources Contact Information Basic Energy Sciences U.S. Department of Energy SC-22/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-3081 F: (301) 903-6594 E: sc.bes@science.doe.gov More Information » October 2013 Spinning a New Type of Magnetic Field Harnessing the spins of electrons in a new way - enabling efficient magnetic switching and holding promise for spintronic devices. Print Text Size: A A A Subscribe FeedbackShare Page Click to enlarge photo. Enlarge Photo Image courtesy of John Xiao Schematic of mechanism for generating a magnetic field. The system consists

417

A New Class of Magnetic Materials with Novel Structural Order | U.S. DOE  

NLE Websites -- All DOE Office Websites (Extended Search)

A New Class of Magnetic Materials with Novel Structural Order A New Class of Magnetic Materials with Novel Structural Order Basic Energy Sciences (BES) BES Home About Research Facilities Science Highlights Benefits of BES Funding Opportunities Basic Energy Sciences Advisory Committee (BESAC) News & Resources Contact Information Basic Energy Sciences U.S. Department of Energy SC-22/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-3081 F: (301) 903-6594 E: sc.bes@science.doe.gov More Information » June 2013 A New Class of Magnetic Materials with Novel Structural Order The discovery of the first binary magnetic quasicrystals will enable the unraveling of the fundamental relationship between the structure and magnetism in aperiodic materials. Print Text Size: A A A Subscribe FeedbackShare Page

418

3D-Printing Spatially Varying BRDFs  

Science Journals Connector (OSTI)

A new method fabricates custom surface reflectance and spatially varying bidirectional reflectance distribution functions (svBRDFs). Researchers optimize a microgeometry for a range of normal distribution functions and simulate the resulting surface's ... Keywords: Three-dimensional displays,Printing,Fabrication,Computational modeling,Solid modeling,Printers,Face recognition,computer graphics,bidirectional reflectance distribution function,BRDF,spatially varying bidirectional reflectance distribution function,svBRDF,3D printing,normal distribution function,NDF,microgeometry,surface reflectance

Olivier Rouiller; Bernd Bickel; Wojciech Matusik; Marc Alexa; Jan Kautz

2013-11-01T23:59:59.000Z

419

Printed circuit dispersive transmission line  

DOE Patents (OSTI)

A printed circuit dispersive transmission line structure is disclosed comprising an insulator, a ground plane formed on one surface of the insulator, a first transmission line formed on a second surface of the insulator, and a second transmission line also formed on the second surface of the insulator and of longer length than the first transmission line and periodically intersecting the first transmission line. In a preferred embodiment, the transmission line structure exhibits highly dispersive characteristics by designing the length of one of the transmission line between two adjacent periodic intersections to be longer than the other. 5 figures.

Ikezi, H.; Lin-Liu, Y.R.; DeGrassie, J.S.

1991-08-27T23:59:59.000Z

420

Printed circuit dispersive transmission line  

DOE Patents (OSTI)

A printed circuit dispersive transmission line structure is disclosed comprising an insulator, a ground plane formed on one surface of the insulator, a first transmission line formed on a second surface of the insulator, and a second transmission line also formed on the second surface of the insulator and of longer length than the first transmission line and periodically intersecting the first transmission line. In a preferred embodiment, the transmission line structure exhibits highly dispersive characteristics by designing the length of one of the transmission line between two adjacent periodic intersections to be longer than the other.

Ikezi, Hiroyuki (Rancho Santa Fe, CA); Lin-Liu, Yuh-Ren (San Diego, CA); DeGrassie, John S. (Encinitas, CA)

1991-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "magnetic vortices print" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Superconducting magnet  

DOE Patents (OSTI)

A superconducting magnet designed to produce magnetic flux densities of the order of 4 to 5 Webers per square meter is constructed by first forming a cable of a plurality of matrixed superconductor wires with each wire of the plurality insulated from each other one. The cable is shaped into a rectangular cross-section and is wound with tape in an open spiral to create cooling channels. Coils are wound in a calculated pattern in saddle shapes to produce desired fields, such as dipoles, quadrupoles, and the like. Wedges are inserted between adjacent cables as needed to maintain substantially radial placement of the long dimensions of cross sections of the cables. After winding, individual strands in each of the cables are brought out to terminals and are interconnected to place all of the strands in series and to maximize the propagation of a quench by alternating conduction from an inner layer to an outer layer and from top half to bottom half as often as possible. Individual layers are separated from others by spiraled aluminum spacers to facilitate cooling. The wound coil is wrapped with an epoxy tape that is cured by heat and then machined to an interference fit with an outer aluminum pipe which is then affixed securely to the assembled coil by heating it to make a shrink fit. In an alternate embodiment, one wire of the cable is made of copper or the like to be heated externally to propagate a quench.

Satti, John A. (Naperville, IL)

1980-01-01T23:59:59.000Z

422

Frequently Asked Questions (FAQ) for the E-print Network -- Energy,  

Office of Scientific and Technical Information (OSTI)

Frequently Asked Questions Frequently Asked Questions Table of Contents General Information What are e-prints? Are e-prints and preprints the same thing? What is the E-print Network: Research Communications for Scientists and Engineers? Who uses the E-print Network? How does the E-print Network help the user? How the E-print Network Works What's in the E-print Network? What are the criteria for inclusion in the E-print Network? How does the E-print Network function? What is E-print Network's search architecture? An overview of tools and services A note to site owners General Information Q: What are e-prints? A: E-prints are scholarly and professional works electronically produced and shared by researchers with the intent of communicating research findings to colleagues. They may include preprints, reprints,

423

Dynamic testing of polydimethylsiloxane for applications in micro-contact roll printing  

E-Print Network (OSTI)

Micro-contact roll printing is an emerging alternative to photolithography as a means of cheaply manufacturing MEMS devices. Micro-contact roll printing control systems can regulate the printing pressure of a polydimethylsiloxane ...

Benjaminson, Emma Claire

2014-01-01T23:59:59.000Z

424

School of Art & Design 3D Printing of Relief Forms onto Ceramic Tiles  

E-Print Network (OSTI)

School of Art & Design 3D Printing of Relief Forms onto Ceramic Tiles Lead: Lharne Shaw 3D printing tile production. It will also assess the feasibility of introducing a 3D slip printing system into both

Evans, Paul

425

3D Optical Printing of Piezoelectric Nanoparticle–Polymer Composite Materials  

Science Journals Connector (OSTI)

ACS ActiveView PDFHi-Res Print, Annotate, Reference QuickView ... Here we demonstrate that efficient piezoelectric nanoparticle–polymer composite materials can be optically printed into three-dimensional (3D) microstructures using digital projection printing. ...

Kanguk Kim; Wei Zhu; Xin Qu; Chase Aaronson; William R. McCall; Shaochen Chen; Donald J. Sirbuly

2014-07-21T23:59:59.000Z

426

Print-and-Peel Fabrication for Microfluidics: What’s in it for Biomedical Applications?  

E-Print Network (OSTI)

of direct three-dimensional (3D) printing of masters using ahave the capability for 3D printing, and hence, for directly3D elements allow for achieving fea- tures, demonstrated with solid-object printing,

Thomas, Marlon S.; Millare, Brent; Clift, Joseph M.; Bao, Duoduo; Hong, Connie; Vullev, Valentine I.

2010-01-01T23:59:59.000Z

427

Modification of Market: John Smith and the Mezzotint Print in Eighteenth-Century England  

E-Print Network (OSTI)

Print in Stuart Britain: 1603-1689. London: British MuseumPrint in Stuart Britain, 1603-1689 (1998), Antony GriffithsPrint in Stuart Britain, 1603-1689 (London: British Museum

Ridel, Amanda-Nicole

2011-01-01T23:59:59.000Z

428

Learning About Magnets!  

NLE Websites -- All DOE Office Websites (Extended Search)

by the National High Magnetic Field Laboratory Learning About Name A magnet is a material or object that creates a magnetic fi eld. This fi eld is invisible, but it creates a...

429

Interface Magnetism in Multiferroics  

E-Print Network (OSTI)

1.2.1 Magnetism . . . . . . . . . . . . . . . . . . . 1.2.2domain walls . . . . . 3 Magnetism of domain walls in BiFeOof electrical control of magnetism in mixed phase BiFeO 3

He, Qing

2011-01-01T23:59:59.000Z

430

Nonlinear nonlocal diffusion of magnetic flux in thin type-II superconductors and Josephson junction arrays: Exact solutions  

E-Print Network (OSTI)

An exact solution of the nonlinear nonlocal diffusion problem is obtained that describes the evolution of the magnetic flux injected into a soft or hard type-II superconductor film or a two-dimensional Josephson junction array. (The magnetic field in vortices is assumed to be perpendicular to the film; the electric field induced by the vortex motion is proportional to the local magnetic induction; flux creep in the hard superconductors under consideration is described by the logarithmic U(j) dependence.) Self-similar flux distributions with sharp square-root fronts are found. The fronts are shown to expand with power law time-dependence. A sharp peak in the middle of the distribution appears in the hard superconductor case.

S. N. Dorogovtsev

1998-07-10T23:59:59.000Z

431

Why an ac Magnetic Field Shifts the Irreversibility Line in Type-II Superconductors  

Science Journals Connector (OSTI)

We show that for a thin superconducting strip placed in a transverse dc magnetic field—the typical geometry of experiments with high- Tc superconductors—the application of a weak ac magnetic field perpendicular to the dc field generates a dc voltage in the strip. This voltage leads to the decay of the critical currents circulating in the strip, and eventually the equilibrium state of the superconductor is established. This relaxation is not due to thermally activated flux creep but to the “walking” motion of vortices in the two-dimensional critical state of the strip with in-plane ac field. Our theory explains the shaking effect that was used for detecting phase transitions of the vortex lattice in superconductors.

Ernst Helmut Brandt and Grigorii P. Mikitik

2002-06-20T23:59:59.000Z

432

Non-perturbative calculation of molecular magnetic properties within current-density functional theory  

SciTech Connect

We present a novel implementation of Kohn–Sham density-functional theory utilizing London atomic orbitals as basis functions. External magnetic fields are treated non-perturbatively, which enable the study of both magnetic response properties and the effects of strong fields, using either standard density functionals or current-density functionals—the implementation is the first fully self-consistent implementation of the latter for molecules. Pilot applications are presented for the finite-field calculation of molecular magnetizabilities, hypermagnetizabilities, and nuclear magnetic resonance shielding constants, focusing on the impact of current-density functionals on the accuracy of the results. Existing current-density functionals based on the gauge-invariant vorticity are tested and found to be sensitive to numerical details of their implementation. Furthermore, when appropriately regularized, the resulting magnetic properties show no improvement over standard density-functional results. An advantage of the present implementation is the ability to apply density-functional theory to molecules in very strong magnetic fields, where the perturbative approach breaks down. Comparison with high accuracy full-configuration-interaction results show that the inadequacies of current-density approximations are exacerbated with increasing magnetic field strength. Standard density-functionals remain well behaved but fail to deliver high accuracy. The need for improved current-dependent density-functionals, and how they may be tested using the presented implementation, is discussed in light of our findings.

Tellgren, E. I., E-mail: erik.tellgren@kjemi.uio.no; Lange, K. K.; Ekström, U.; Helgaker, T. [Centre for Theoretical and Computational Chemistry, Department of Chemistry, University of Oslo, P.O. Box 1033 Blindern, N-0315 Oslo (Norway)] [Centre for Theoretical and Computational Chemistry, Department of Chemistry, University of Oslo, P.O. Box 1033 Blindern, N-0315 Oslo (Norway); Teale, A. M., E-mail: andrew.teale@nottingham.ac.uk [Centre for Theoretical and Computational Chemistry, Department of Chemistry, University of Oslo, P.O. Box 1033 Blindern, N-0315 Oslo (Norway); School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD (United Kingdom); Furness, J. W. [School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD (United Kingdom)] [School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD (United Kingdom)

2014-01-21T23:59:59.000Z

433

Department of Energy Strategic Plan, May 2011, Print Quality | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Department of Energy Strategic Plan, May 2011, Print Quality Department of Energy Strategic Plan, May 2011, Print Quality Department of Energy Strategic Plan, May 2011, Print Quality Posted here are publication materials related to the Department of Energy's Strategic Plan of 2011. DOE_2011-Strategic-Plan_High-Resolution_Print-Quality is a full-data, high-resolution version of the document. This will print/reproduce with the maximum resolution available from your output device (printer). This is a 15.7 Mb file. DOE_2011-Strategic-Plan_Medium-Resolution_Print-Quality is a medium-resolution version of the document. The images have been slightly downsampled and compressed so the file can be easier transmitted. This will print/reproduce at medium resolution on your output device (printer). This is a 3.6 Mb file.

434

Femtosecond Opto-Magnetism  

Science Journals Connector (OSTI)

We demonstrate that circularly polarized laser pulses may selectively excite different modes of magnetic resonance, realize quantum control of magnons, trigger magnetic phase...

Kimel, Alexey; Kirilyuk, A; Rasing, Th

435

E-Print Network 3.0 - afterglow emission properties Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

reserved. Printed Summary: . Printed OFF-AXIS AFTERGLOW EMISSION FROM JETTED GAMMA-RAY BURSTS Jonathan Granot, Alin Panaitescu, 2 Pawan... 1999) and breaks seen optical...

436

E-Print Network 3.0 - afterglow emission energy Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

reserved. Printed Summary: . Printed OFF-AXIS AFTERGLOW EMISSION FROM JETTED GAMMA-RAY BURSTS Jonathan Granot, Alin Panaitescu, 2 Pawan... universal energy, orphan afterglows...

437

E-Print Network 3.0 - afterglow emission intrinsically Sample...  

NLE Websites -- All DOE Office Websites (Extended Search)

reserved. Printed Summary: . Printed OFF-AXIS AFTERGLOW EMISSION FROM JETTED GAMMA-RAY BURSTS Jonathan Granot, Alin Panaitescu, 2 Pawan... 1999) and breaks seen optical...

438

E-Print Network 3.0 - acerca da pastoral Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

Environmental Sciences and Ecology 45 Print This Close Window Sistema inalmbrico le da seguimiento al reflujo Summary: Print This Close Window Sistema inalmbrico le da...

439

An Algorithm for Computing Customized 3D Printed Implants with Curvature Constrained Channels for Enhancing  

E-Print Network (OSTI)

An Algorithm for Computing Customized 3D Printed Implants with Curvature Constrained Channels results in 3D printing and steerable needle motion planning to create customized implants containing

North Carolina at Chapel Hill, University of

440

Impact of 3D printing on global supply chains by 2020 .  

E-Print Network (OSTI)

??This thesis aims to quantitatively estimate the potential impact of 3D Printing on global supply chains. Industrial adoption of 3D Printing has been increasing gradually… (more)

Bodla, Muhammad Raheel

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "magnetic vortices print" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Poster Printing Services at the Biomedical and Health Sciences Institute Poster printing services are available in the BHSI (via our HP Designjet 4000ps large  

E-Print Network (OSTI)

Poster Printing Services at the Biomedical and Health Sciences Institute Poster printing services minutes poster edits, so make sure your document is "camera ready" or final version ready to print. If you file and we'll check it or run a test print. Turnaround time: We try to run posters the same day you

Arnold, Jonathan

442

Quadrupole magnets measurement  

SciTech Connect

A rotating coil setup is designed for quadrupole magnet measurement at the Accelerator Test Facility (ATF); Hall probe measurement was also performed for one of each type of quadrupole magnet. Both mechanical and magnetic properties of the quadrupole magnets were measured, the results are reported here. 5 refs., 12 figs., 12 tabs.

Wang, Xijie (California Univ., Los Angeles, CA (USA). Center for Advanced Accelerators Physics); Sylvester, C. (Brookhaven National Lab., Upton, NY (USA))

1991-01-01T23:59:59.000Z

443

Magnetic Imaging Wolfgang Kuch  

E-Print Network (OSTI)

Magnetic Imaging Wolfgang Kuch Freie Universit¨at Berlin, Institut f¨ur Experimentalphysik, Arnimallee 14, 14195 Berlin, Germany kuch@physik.fu-berlin.de Abstract. Imaging of magnetic domains has- ern techniques is used nowadays routinely for magnetic imaging of magnetic ma- terials

Kuch, Wolfgang

444

Magnetism in Nanocrystalline Gold  

Science Journals Connector (OSTI)

Magnetism in Nanocrystalline Gold ... Bridging the current gap in experimental study of magnetism in bare gold nanomaterials, we report here on magnetism in gold nanocrystalline films produced by cluster deposition in the aggregate form that can be considered as a crossover state between a nanocluster and a continuous film. ... gold; nanocrystalline film; magnetism; cluster deposition; SQUID magnetometry ...

Vladimir Tuboltsev; Alexander Savin; Alexandre Pirojenko; Jyrki Räisänen

2013-07-07T23:59:59.000Z

445

Magnetism of spiral galaxies  

Science Journals Connector (OSTI)

... magnetic fields of spiral galaxies has taken a special place in the study of cosmic magnetism, but magnetic fields are a universal property of all galactic-type objects, as is ... . The past ten years have been notable for rapid, qualitative progress in understanding the magnetism of spiral galaxies, a result of both theoretical and observational developments. A few decades ...

Alexander Ruzmaikin; Dmitry Sokoloff; Anvar Shukurov

1988-11-24T23:59:59.000Z

446

Magnetism in microquasars  

Science Journals Connector (OSTI)

...Lynden-Bell, E. R. Priest and N. O. Weiss Magnetism in microquasars I. F. Mirabel Centre...binaries|magnetic field|plasma physics| Magnetism in microquasars By I. F. Mirabel Centre...Trans. R. Soc. Lond. A (2000) Magnetism in microquasars 843 At rst glance it...

2000-01-01T23:59:59.000Z

447

Early History of Magnetism  

Science Journals Connector (OSTI)

... 2, Dr. J. B. Kramer read a paper on “The Early History of Magnetism”, in which he discussed the various accounts of the first discovery of a magnet ... accounts of the first discovery of a magnet, and the development of the science of magnetism down to A.D. 1600. His remarks were divided into five sections, the ...

1932-03-19T23:59:59.000Z

448

Towards Understanding Electronic Switching in Magnets | U.S. DOE Office of  

NLE Websites -- All DOE Office Websites (Extended Search)

Understanding Electronic Switching in Magnets Understanding Electronic Switching in Magnets Basic Energy Sciences (BES) BES Home About Research Facilities Science Highlights Benefits of BES Funding Opportunities Basic Energy Sciences Advisory Committee (BESAC) News & Resources Contact Information Basic Energy Sciences U.S. Department of Energy SC-22/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-3081 F: (301) 903-6594 E: sc.bes@science.doe.gov More Information » September 2013 Towards Understanding Electronic Switching in Magnets Researchers have invented a new x-ray imaging technique that could reveal key atomic-scale properties in ferroelectric magnetic materials. Print Text Size: A A A Subscribe FeedbackShare Page Click to enlarge photo. Enlarge Photo Image courtesy of Argonne National Laboratory

449

Crystallographic Boundary in a Magnetic Shape Memory Material  

NLE Websites -- All DOE Office Websites (Extended Search)

Crystallographic Boundary in a Crystallographic Boundary in a Magnetic Shape Memory Material Crystallographic Boundary in a Magnetic Shape Memory Material Print Wednesday, 18 April 2012 11:37 A research team has shown the existence of a special structural boundary in an intermetallic compound by combining the unique measurement facilities at the ALS, the single-crystal production capabilities of Tohoku University (Japan), and the materials science expertise of Johannes-Gutenberg-University (Germany). Conventional shape memory materials, such as the commercially available Nitinol (an alloy of nickel and titanium used in microsensing, actuation, and medical devices), undergo a phase transformation with cooling or heating when large areas of a sample distort along a single axis, and where the atomic-unit cell "stretching" from a cube to a rectangular prism occurs. In contrast, magnetic shape memory (MSM) materials are much more rare but have an advantage: The axis of magnetic anisotropy is coupled to the direction of stretching, so a perfect MSM crystal can be made to flex and bend reversibly by applying an external magnetic field.

450

Magnetic Fields Analogous to electric field, a magnet  

E-Print Network (OSTI)

characteristic of elementary particles such as an electron #12;Magnetic Fields Magnetic field lines Direction;Magnetic Fields Magnetic field lines enter one end (south) of magnet and exit the other end (north) Opposite magnetic poles attract like magnetic poles repel #12;Like the electric field lines

Bertulani, Carlos A. - Department of Physics and Astronomy, Texas A&M University

451

E-Print Network 3.0 - active suichoku fin Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

vortical flows on the dynamic characteristics of vertical fin structures. Extensive wind-tunnel ... Source: Yaman, Yavuz - Department of Aerospace Engineering, Middle East...

452

E-Print Network 3.0 - ac josephson effect Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

Effect, Wiley, New York, 1982, p. 400. 21 A. Gurevich, Phys... Generation of tunable terahertz radiation using Josephson vortices: ... Source: Nori, Franco - Institute for...

453

3D printing of multifunctional nanocomposites  

Science Journals Connector (OSTI)

Summary Additive manufacturing (aka, 3D printing) holds strong potential for the formation of a new class of multifunctional nanocomposites. With the ability to print complex 3D objects layer by layer, additive manufacturing with nanomaterials could be leveraged in new ways toward greater control over material properties across part dimensions. Multifunctionality through embedding of nanomaterials can further extend capabilities of nanocomposites to properties such as gradients in thermal and electrical conductivity, photonic emissions tunable for wavelength, and increased strength and reduced weight. Here we discuss the promises offered by nanomaterials-based additive manufacturing as a new paradigm for nanocomposite functionality.

Thomas A. Campbell; Olga S. Ivanova

2013-01-01T23:59:59.000Z

454

HTS Magnet Program | Superconducting Magnet Division  

NLE Websites -- All DOE Office Websites (Extended Search)

HTS Magnet Program HTS Magnet Program High Temperature Superconductors (HTS) have the potential to revolutionize the field of superconducting magnets for particle accelerators, energy storage and medical applications. This is because of the fact that as compared to the conventional Low Temperature Superconductors (LTS), the critical current density (Jc ) of HTS falls slowly both: as a function of increasing field, and as a function of increasing temperature These unique properties can be utilized to design and build: HTS magnets that produce very high fields (20 - 50 T) HTS magnets that operate at elevated temperatures (20 - 77 K) This is a significant step forward over the convention LTS magnets which generally operate at a temperature of ~4 K and with field usually limited

455

Nanocomposite Magnets: Transformational Nanostructured Permanent Magnets  

SciTech Connect

Broad Funding Opportunity Announcement Project: GE is using nanomaterials technology to develop advanced magnets that contain fewer rare earth materials than their predecessors. Nanomaterials technology involves manipulating matter at the atomic or molecular scale, which can represent a stumbling block for magnets because it is difficult to create a finely grained magnet at that scale. GE is developing bulk magnets with finely tuned structures using iron-based mixtures that contain 80% less rare earth materials than traditional magnets, which will reduce their overall cost. These magnets will enable further commercialization of HEVs, EVs, and wind turbine generators while enhancing U.S. competitiveness in industries that heavily utilize these alternatives to rare earth minerals.

None

2010-10-01T23:59:59.000Z

456

Minutes from the March 17, 2010 Printing and Mail Teleconference  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

March 17, 2010 March 17, 2010 Printing and Mail Managers Exchange Forum Teleconference Twenty-eight individuals participated in the Printing and Mail Managers Exchange Forum, which included Printing and Mail Managers and Contractors. Comments/Additions to last Months Minutes Dallas Woodruff, Headquarters opened the meeting by thanking everyone for participating in the today's teleconference. Printing Agenda Items... Upcoming Congressional Joint Committee on Printing Commercial Printing Report "JCP Form No. 2" Dallas Woodruff, Headquarters informed the group that sites should receive the call letter for the report on or around March 30, 2010. The report is due back to Headquarters by May 3, 2009. Mr. Woodruff reminded the group that they must report negative responses as well.

457

Minutes from the November 17, 2010 Printing and Mail Teleconference  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

November 17, 2010 November 17, 2010 Printing and Mail Managers Exchange Forum Teleconference Twenty seven individuals participated in the Printing and Mail Managers Exchange Forum, which included Printing and Mail Managers and Contractors Comments/Additions to last Months Minutes No comments. Printing Agenda Items......... Update on the Department-wide "Three-Year Plan" Dallas Woodruff, Headquarters opened the meeting by thanking everyone for providing their sites Three-Year Plan data to Headquarters in timely manner. Mr. Woodruff went on to say a number of individuals indentified a problem with the narrative section of the PPAFI Spreadsheets (unable to print the narratives). Mr. Woodruff notified the programmer of the narrative section printing glitch.

458

Minutes from the January 20, 2010 Printing and Mail Teleconference  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

, 2010 , 2010 Printing and Mail Managers Exchange Forum Teleconference Twenty-one individuals participated in the Printing and Mail Managers Exchange Forum, which included Printing and Mail Managers and Contractors. Comments/Additions to last Months Minutes Dallas Woodruff, Headquarters opened the meeting by thanking everyone for participating in the today's teleconference. Printing Agenda Items... Update on the Department-wide Printing and Publishing Activities Report Three-Year Plan. Dallas Woodruff, Headquarters thanked the group for their contributions made to the Department-wide printing program during FY 2009. Mr Woodruff also thanked the group for providing data for the FY 2009 Three-Year Plan in a timely manner. The Three-Year Plan is in track for completion before the February

459

871 The Meteoritical Society, 2009. Printed in USA. Meteoritics & Planetary Science 44, Nr 6, 871878 (2009)  

E-Print Network (OSTI)

871 © The Meteoritical Society, 2009. Printed in USA. Meteoritics & Planetary Science 44, Nr 6, 871

Perfect, Ed

460

Computational & Mathematical Organization Theory 6, 8398, 2000. c 2000 Kluwer Academic Publishers. Printed in The Netherlands.  

E-Print Network (OSTI)

. Printed in The Netherlands. Generation Supply Bidding in Perfectly Competitive Electricity Markets GEORGE

Note: This page contains sample records for the topic "magnetic vortices print" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Transgenic Research 9: 127135, 2000. 2000 Kluwer Academic Publishers. Printed in the Netherlands.  

E-Print Network (OSTI)

Transgenic Research 9: 127­135, 2000. © 2000 Kluwer Academic Publishers. Printed in the Netherlands

Korban, Schuyler S.

462

Mycopathologia 140: 5158, 1997. 1997 Kluwer Academic Publishers. Printed in the Netherlands.  

E-Print Network (OSTI)

Mycopathologia 140: 51­58, 1997. © 1997 Kluwer Academic Publishers. Printed in the Netherlands. 51

Hammock, Bruce D.

463

MultiFab : a multi-material 3D printing platform ; Multi Fab : a multi-material 3D printing platform ; Multi-material 3D printing platform ; Multi-material 3-dimensional printing platform ; Multi-material three-dimensional printing platform .  

E-Print Network (OSTI)

??This thesis presents the development of MultiFab, a multi-material 3D printing architecture that is high-resolution, scalable, and low-cost. MultiFab enables the 3D printing of parts… (more)

Ramos-Maltés, Javier Eduardo

2014-01-01T23:59:59.000Z

464

18.9 %-EFFICIENT SCREEN-PRINTED SOLAR CELLS APPLYING A PRINT-ON-PRINT Helge Hannebauer1  

E-Print Network (OSTI)

is caused by an improved short circuit current of up to 37.4 mA/cm2 which is explained by the reduced loss and hence increase the short circuit current (Jsc). However, in case of standard single printed Ag. Afterwards, the wafers are fired in a conveyor belt furnace followed by a laser edge isolation. The Po

465

ALSNews Vol. 344  

NLE Websites -- All DOE Office Websites (Extended Search)

ALSNews Vol. 344 Print ALSNews Vol. 344 Print Register Now for the 2013 ALS User Meeting! Registration is now open for this year's meeting. A full schedule includes facility reports, recent science highlights, a student poster contest and "slam," and 13 focused workshops. Scheduled keynote speakers include George Crabtree (ANL), Jim Krupnick (LBNL), Michael Eisen, and Jamie Cate (UC Berkeley). Register now! Reversing the Circulation of Magnetic Vortices Recently, magnetic vortices have drawn scientists toward the possibility of multibit magnetic memory in which each logic unit has four states instead of two. Previous studies showed how to flip the vortex polarity. Now, researchers show how to reverse the circulation from clockwise to counterclockwise. Read more...

466

ALSNews Vol. 344  

NLE Websites -- All DOE Office Websites (Extended Search)

4 Print 4 Print Register Now for the 2013 ALS User Meeting! Registration is now open for this year's meeting. A full schedule includes facility reports, recent science highlights, a student poster contest and "slam," and 13 focused workshops. Scheduled keynote speakers include George Crabtree (ANL), Jim Krupnick (LBNL), Michael Eisen, and Jamie Cate (UC Berkeley). Register now! Reversing the Circulation of Magnetic Vortices Recently, magnetic vortices have drawn scientists toward the possibility of multibit magnetic memory in which each logic unit has four states instead of two. Previous studies showed how to flip the vortex polarity. Now, researchers show how to reverse the circulation from clockwise to counterclockwise. Read more... Contact: Peter Fischer and Vojtěch Uhlíř

467

ALSNews Vol. 344  

NLE Websites -- All DOE Office Websites (Extended Search)

4 Print 4 Print Register Now for the 2013 ALS User Meeting! Registration is now open for this year's meeting. A full schedule includes facility reports, recent science highlights, a student poster contest and "slam," and 13 focused workshops. Scheduled keynote speakers include George Crabtree (ANL), Jim Krupnick (LBNL), Michael Eisen, and Jamie Cate (UC Berkeley). Register now! Reversing the Circulation of Magnetic Vortices Recently, magnetic vortices have drawn scientists toward the possibility of multibit magnetic memory in which each logic unit has four states instead of two. Previous studies showed how to flip the vortex polarity. Now, researchers show how to reverse the circulation from clockwise to counterclockwise. Read more... Contact: Peter Fischer and Vojtěch Uhlíř

468

ALSNews Vol. 344  

NLE Websites -- All DOE Office Websites (Extended Search)

4 Print 4 Print Register Now for the 2013 ALS User Meeting! Registration is now open for this year's meeting. A full schedule includes facility reports, recent science highlights, a student poster contest and "slam," and 13 focused workshops. Scheduled keynote speakers include George Crabtree (ANL), Jim Krupnick (LBNL), Michael Eisen, and Jamie Cate (UC Berkeley). Register now! Reversing the Circulation of Magnetic Vortices Recently, magnetic vortices have drawn scientists toward the possibility of multibit magnetic memory in which each logic unit has four states instead of two. Previous studies showed how to flip the vortex polarity. Now, researchers show how to reverse the circulation from clockwise to counterclockwise. Read more... Contact: Peter Fischer and Vojtěch Uhlíř

469

Tamper resistant magnetic stripes  

DOE Patents (OSTI)

This invention relates to a magnetic stripe comprising a medium in which magnetized particles are suspended and in which the encoded information is recorded by actual physical rotation or alignment of the previously magnetized particles within the flux reversals of the stripe which are 180.degree. opposed in their magnetic polarity. The magnetized particles are suspended in a medium which is solid, or physically rigid, at ambient temperatures but which at moderately elevated temperatures, such as 40.degree. C., is thinable to a viscosity permissive of rotation of the particles therein under applications of moderate external magnetic field strengths within acceptable time limits.

Naylor, Richard Brian (Albuquerque, NM); Sharp, Donald J. (Albuquerque, NM)

1999-01-01T23:59:59.000Z

470

E-print Network home page -- Energy, science, and technology...  

NLE Websites -- All DOE Office Websites (Extended Search)

Energy, science, and technology for the research community Enter Search Terms Search Advanced Search The E-print Network is . . . . . . a vast, integrated network of electronic...

471

Printing 3D Catalytic Devices | The Ames Laboratory  

NLE Websites -- All DOE Office Websites (Extended Search)

Printing 3D Catalytic Devices Ames Laboratory scientist Igor Slowing discusses using 3D printers to create new materials, including catalysts...

472

UK Home Office has tested 3D-printed guns  

Science Journals Connector (OSTI)

Researchers at the Home Office's Centre for Applied Science and Technology (CAST) printed a gun in an effort to understand their potential threat, New Scientist has learned.

2014-01-01T23:59:59.000Z

473

3D Printing of nanostructured catalytic materials | The Ames...  

NLE Websites -- All DOE Office Websites (Extended Search)

3D Printing of nanostructured catalytic materials Over the last couple of decades, scientists have been able to develop a tremendous control over the synthesis and properties of...

474

Minutes from the July 21, 2010 Printing and Mail Teleconference  

Office of Environmental Management (EM)

for review and then to the Joint Committee on Printing later this year. Rose Bachman, Bettis Atomic Power Laboratory asked whether changes were made regarding the number of...

475

Minutes from the May 3, 2012 Printing and Mail Teleconference  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

3, 2012 Printing and Mail Managers Exchange Forum Teleconference Al Majors opened the meeting by introducing Derrick Milner, Program Manager from the General Services...

476

Just Plain Cool, the 3D Printed Shelby Cobra  

Energy.gov (U.S. Department of Energy (DOE))

Indistinguishable from conventional production vehicles on display, the 3D printed Shelby Cobra celebrated its 50th anniversary at the Detroit Auto Show in early January.

477

Ames Laboratory 3D printing technology research taking shape...  

NLE Websites -- All DOE Office Websites (Extended Search)

3D printing technology research taking shape Contacts: For Release: Sept. 23, 2014 Igor Slowing, Chemical and Biological Sciences, 515-294-1959 Laura Millsaps, Public Affairs,...

478

Making 3D Printed Christmas Ornaments | GE Global Research  

NLE Websites -- All DOE Office Websites (Extended Search)

enjoys baking cookies and snowball fights. Recent Posts by This Contributor Using 3D Printing to Redesign Santa's Sleigh A Sneak Peek Into Santa's Smarter Sleigh Subscribe to...

479

assuring consumer safety: Topics by E-print Network  

NLE Websites -- All DOE Office Websites (Extended Search)

is of great significance. unknown authors 412 Assuring Equity Through Health and Health Care Reform Conference Registration Information (Type or Print) Biology and Medicine...

480

E-Print Network 3.0 - argentina geothermobarometry metamorphic...  

NLE Websites -- All DOE Office Websites (Extended Search)

London, Vol. 160, 2003, pp. 555564. Printed in Great Britain. Late Precambrian UPb titanite age for peak regional metamorphism and Summary: . 555 Late Precambrian U-Pb titanite...

Note: This page contains sample records for the topic "magnetic vortices print" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation  

NLE Websites -- All DOE Office Websites (Extended Search)

X-Ray Imaging of the Dynamic X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation X-Ray Imaging of the Dynamic Magnetic Vortex Core Deformation Print Wednesday, 25 November 2009 00:00 Magnetic thin-film nanostructures can exhibit a magnetic vortex state in which the magnetization vectors lie in the film plane and curl around in a closed loop. At the very center of the vortex, a small, stable core exists where the magnetization points either up or down out of the plane. Three years ago, the discovery of an easy core reversal mechanism at the ALS not only made the possibility of using such systems as magnetic memories much more realistic, it also initiated investigation of the core switching mechanism itself. Now, a Belgian-German-ALS collaboration has used high-resolution, time-resolved, magnetic x-ray microscopy to experimentally reveal the first step of the reversal process: the dynamic deformation of the vortex core. The group also measured a critical vortex velocity above which reversal occurs. Both these observations provide the first experimental support for the postulated reversal mechanism.

482

National High Magnetic Field Laboratory: An Introduction to Magnets...  

NLE Websites -- All DOE Office Websites (Extended Search)

resistive magnet is here at the Magnet Lab: It can generate a sustained magnetic field of 35 tesla. (Were not counting here our world-record hybrid magnet or the stronger,...

483

Federal Recycling Program Printed on recycled paper.  

E-Print Network (OSTI)

#12;Federal Recycling Program Printed on recycled paper. The Forest Health Technology Enterprise of discrimination, write USDA, Director, Office of Civil Rights, Room 326-W, Whitten Building, 1400 independence MALEZAS POR ENEMIGOS NATURALES R. G. VAN DRIESCHE University of Massachusetts Amherst, Massachusetts, USA

Hoddle, Mark S.

484

PRINT ONLY: GLOBAL WARMING Alexeev V. A.  

E-Print Network (OSTI)

PRINT ONLY: GLOBAL WARMING Alexeev V. A. Global Warming: 0.6°C or Less? [#1035] The peculiarities of global warming on the Earth during the last century are discussed. Lunar and Planetary Science XXXVIII (2007) full818.pdf #12;GLOBAL WARMING: 0.6 OR LESS? V.A.Alexeev; Vernadsky Institute of Geochemistry

Rathbun, Julie A.

485

IITS Printing Terms of Conditions TECHNICAL ISSUES  

E-Print Network (OSTI)

will reprint the same document at no additional cost. b. Note: failure to follow the Designjet instructions on the web https://www.utsc.utoronto.ca/~accounts/labvisitor.cgi. 2. Students can continue to load the funds to load funds onto TCard+ using e-accounts, however, the funds may not be available for printing until

Boonstra, Rudy

486

3D analysis of magnetization distribution magnetized by capacitor-discharge impulse magnetizer  

Science Journals Connector (OSTI)

Method for calculating the magnetization distribution magnetized by capacitor-discharge impulse magnetizer is expanded to 3D, and the calculated flux distribution is compared with measured one.

Norio Takahashi

2001-01-01T23:59:59.000Z

487

Spin and orbital magnetization loops obtained using magnetic Compton scattering  

SciTech Connect

We present an application of magnetic Compton scattering (MCS) to decompose a total magnetization loop into spin and orbital magnetization contributions. A spin magnetization loop of SmAl{sub 2} was measured by recording the intensity of magnetic Compton scattering as a function of applied magnetic field. Comparing the spin magnetization loop with the total magnetization one measured by a vibrating sample magnetometer, the orbital magnetization loop was obtained. The data display an anti-coupled behavior between the spin and orbital magnetizations and confirm that the orbital part dominates the magnetization.

Itou, M.; Sakurai, Y. [Japan Synchrotron Radiation Research Institute, SPring-8, Hyogo 679-5198 (Japan)] [Japan Synchrotron Radiation Research Institute, SPring-8, Hyogo 679-5198 (Japan); Koizumi, A. [Graduate School of Materials Science, University of Hyogo, Hyogo 678-1297 (Japan)] [Graduate School of Materials Science, University of Hyogo, Hyogo 678-1297 (Japan)

2013-02-25T23:59:59.000Z

488

Recent lunar magnetism  

E-Print Network (OSTI)

The magnetization of young lunar samples (magnetic fields (e.g. core dynamo and long-lived impact plasma fields) have not been present within the last 1.5 Ga. To better ...

Buz, Jennifer

2011-01-01T23:59:59.000Z

489

Metallic Magnetic Hetrostructures  

E-Print Network (OSTI)

This work studied sputter deposited conventional spin valves (SV) and related structures. In SV layered structures, two ferromagnetic layers are separated by a non-magnetic spacer. Under an external magnetic field, the relative orientation...

Leung, Chi Wah

490

Plasma Magnetic Insulation  

Science Journals Connector (OSTI)

29 June 1987 research-article Plasma Magnetic Insulation B. B. Kadomtsev Theoretically the strong magnetic field of a tokamak should confine electrons and ions in a high-temperature...

1987-01-01T23:59:59.000Z

491

Magnetic assisted statistical assembly  

E-Print Network (OSTI)

The objective of this thesis is to develop a process using magnetic forces to assemble micro-components into recesses on silicon based integrated circuits. Patterned SmCo magnetic thin films at the bottom of recesses are ...

Cheng, Diana I

2008-01-01T23:59:59.000Z

492

Magnetic Nanoparticle NANOMATERIALS  

E-Print Network (OSTI)

Magnetic Nanoparticle Metrology NANOMATERIALS We are developing best practice metrology for characterization of magnetic nanoparticle systems (e.g. blocking temperature, anisotropy, property distributions, T nanoparticles and provide guidelines to the FDA to properly compare systems when approving nanoparticle systems

493

Uranium Monochalcogenides: Magnetic Form Factor and Magnetic Neutron Scattering  

Science Journals Connector (OSTI)

Fig. R.66. UY. (A) Magnetic form factor. The radial ?j i? integrals, which contribute to the neutron magnetic fo...

R. Tro?

2009-01-01T23:59:59.000Z

494

LHC Magnet Program | Superconducting Magnet Division  

NLE Websites -- All DOE Office Websites (Extended Search)

Magnet Program Magnet Program The Superconducting Magnet Division is building a number of dipole magnets for the Large Hadron Collider (LHC), which is now under construction at CERN in Geneva, Switzerland. Scheduled to begin operation in 2007, this machine will collide beams of protons with the unprecedented energy of 7 TeV per beam to explore the nature of matter at its most basic level (RHIC can collide beams of protons with energies of 0.25 TeV, but is mostly used to collide heavy ions with energies of 0.1 TeV per nucleon). The magnets are being built as part of the US program, recommended by the High Energy Physics Advisory Panel (HEPAP) and approved by Congress, to contribute to the construction and, later, use of that frontier machine by the US high energy physics community. Fermi National Accelerator Laboratory (FNAL) and

495

Magnetic susceptibility in QCD  

E-Print Network (OSTI)

Magnetic susceptibility in the deconfined phase of QCD is calculated in a closed form using a recent general expression for the quark gas pressure in magnetic field. Quark selfenergies are entering the result via Polyakov line factors and ensure the total paramagnetic effect, increasing with temperature. A generalized form of magnetic susceptibility in nonzero magnetic field suitable for experimental and lattice measurements is derived, showing a good agreement with available lattice data.

V. D. Orlovsky; Yu. A. Simonov

2014-05-12T23:59:59.000Z

496

Magnetism Theory Group / POSTECH Magnetism Theory Group / POSTECH  

E-Print Network (OSTI)

Magnetism Theory Group / POSTECH #12;Magnetism Theory Group / POSTECH #12;Magnetism Theory Group / POSTECH #12;Magnetism Theory Group / POSTECH #12;Magnetism Theory Group / POSTECH J.H . Park et al. #12;'s of FeinCsm e tal The chargeandorbitalordering geom etryin YB a C o 2 O 5 S. K. Kwon etal .Magnetism Theory

Min, Byung Il

497

RESEARCH: Argonne's Super Magnet  

Science Journals Connector (OSTI)

RESEARCH: Argonne's Super Magnet ... The world's largest superconducting magnet has been successfully built and operated by Argonne National Laboratory, at Argonne, Ill. ... The magnet will be part of Argonne's bubble chamber, also the world's largest, which should be completed on schedule this summer. ...

1969-02-03T23:59:59.000Z

498

Noble gas magnetic resonator  

DOE Patents (OSTI)

Precise measurements of a precessional rate of noble gas in a magnetic field is obtained by constraining the time averaged direction of the spins of a stimulating alkali gas to lie in a plane transverse to the magnetic field. In this way, the magnetic field of the alkali gas does not provide a net contribution to the precessional rate of the noble gas.

Walker, Thad Gilbert; Lancor, Brian Robert; Wyllie, Robert

2014-04-15T23:59:59.000Z

499

Magnetism in transition metals  

Science Journals Connector (OSTI)

By using the Hubbard tight-binding-type Hamiltonian and the cluster Bethe-lattice approximation we calculate for Fe the Curie temperature TC=2250 K and the temperature dependence of the magnetic moments and the magnetization. Moreover, we show how previous theories for itinerant magnets may be extended to include short-range spin correlations.

J. L. Morán-López; K. H. Bennemann; M. Avignon

1981-06-01T23:59:59.000Z

500

A Study in Magnetism  

Science Journals Connector (OSTI)

... this century, for the simple comprehensiveness and original beauty of his researches in electricity and magnetism; chiefly, perhaps, for his discovery of magneto-electricity—the kind of electricity that ... space surrounding a magnet was thrown into a peculiar condition by the presence of the magnetism. Two centuries previously another Englishman, as uniquely great if not greater, Dr. Gilbert ...

SILVANUS P. THOMPSON

1878-11-28T23:59:59.000Z