System and method for manipulating domain pinning and reversal in ferromagnetic materials
Abstract
A method for manipulating domain pinning and reversal in a ferromagnetic material comprises applying an external magnetic field to a uniaxial ferromagnetic material comprising a plurality of magnetic domains, where each domain has an easy axis oriented along a predetermined direction. The external magnetic field is applied transverse to the predetermined direction and at a predetermined temperature. The strength of the magnetic field is varied at the predetermined temperature, thereby isothermally regulating pinning of the domains. A magnetic storage device for controlling domain dynamics includes a magnetic hard disk comprising a uniaxial ferromagnetic material, a magnetic recording head including a first magnet, and a second magnet. The ferromagnetic material includes a plurality of magnetic domains each having an easy axis oriented along a predetermined direction. The second magnet is positioned adjacent to the magnetic hard disk and is configured to apply a magnetic field transverse to the predetermined direction.
- Inventors:
- Issue Date:
- Research Org.:
- The University of Chicago, Chicago, IL (United States); UCL Business PLC, London (Great Britain)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1176524
- Patent Number(s):
- 8558333
- Application Number:
- 13/383,059
- Assignee:
- The University of Chicago (Chicago, IL) ; UCL Business PLC (London, GB)
- Patent Classifications (CPCs):
-
G - PHYSICS G11 - INFORMATION STORAGE G11C - STATIC STORES
- DOE Contract Number:
- FG02-99ER45789
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 2010 Jul 09
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Silevitch, Daniel M., Rosenbaum, Thomas F., and Aeppli, Gabriel. System and method for manipulating domain pinning and reversal in ferromagnetic materials. United States: N. p., 2013.
Web.
Silevitch, Daniel M., Rosenbaum, Thomas F., & Aeppli, Gabriel. System and method for manipulating domain pinning and reversal in ferromagnetic materials. United States.
Silevitch, Daniel M., Rosenbaum, Thomas F., and Aeppli, Gabriel. Tue .
"System and method for manipulating domain pinning and reversal in ferromagnetic materials". United States. https://www.osti.gov/servlets/purl/1176524.
@article{osti_1176524,
title = {System and method for manipulating domain pinning and reversal in ferromagnetic materials},
author = {Silevitch, Daniel M. and Rosenbaum, Thomas F. and Aeppli, Gabriel},
abstractNote = {A method for manipulating domain pinning and reversal in a ferromagnetic material comprises applying an external magnetic field to a uniaxial ferromagnetic material comprising a plurality of magnetic domains, where each domain has an easy axis oriented along a predetermined direction. The external magnetic field is applied transverse to the predetermined direction and at a predetermined temperature. The strength of the magnetic field is varied at the predetermined temperature, thereby isothermally regulating pinning of the domains. A magnetic storage device for controlling domain dynamics includes a magnetic hard disk comprising a uniaxial ferromagnetic material, a magnetic recording head including a first magnet, and a second magnet. The ferromagnetic material includes a plurality of magnetic domains each having an easy axis oriented along a predetermined direction. The second magnet is positioned adjacent to the magnetic hard disk and is configured to apply a magnetic field transverse to the predetermined direction.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Oct 15 00:00:00 EDT 2013},
month = {Tue Oct 15 00:00:00 EDT 2013}
}
Works referenced in this record:
Critical behavior of uniaxial systems with strong dipolar interactions
journal, January 1976
- Brézin, E.; Zinn-Justin, J.
- Physical Review B, Vol. 13, Issue 1
Exact Relations among Amplitudes at Critical Points of Marginal Dimensionality
journal, November 1975
- Aharony, A.; Halperin, B. I.
- Physical Review Letters, Vol. 35, Issue 19
Quantum Critical Behavior for a Model Magnet
journal, July 1996
- Bitko, D.; Rosenbaum, T. F.; Aeppli, G.
- Physical Review Letters, Vol. 77, Issue 5
Neutron scattering and the critical behavior of the three-dimensional Ising antiferromagnet
journal, April 1987
- Belanger, D. P.; Yoshizawa, H.
- Physical Review B, Vol. 35, Issue 10
Critical behavior of a site-diluted three-dimensional Ising magnet
journal, June 1983
- Birgeneau, R. J.; Cowley, R. A.; Shirane, G.
- Physical Review B, Vol. 27, Issue 11
Dipolar magnets and glasses: Neutron-scattering, dynamical, and calorimetric studies of randomly distributed Ising spins
journal, September 1990
- Reich, D. H.; Ellman, B.; Yang, J.
- Physical Review B, Vol. 42, Issue 7
The random field Ising model
journal, November 1991
- Belanger, D. P.; Young, A. P.
- Journal of Magnetism and Magnetic Materials, Vol. 100, Issue 1-3
Induced Random Fields in the Quantum Ising Magnet in a Transverse Magnetic Field
journal, December 2006
- Tabei, S. M. A.; Gingras, M. J. P.; Kao, Y. -J.
- Physical Review Letters, Vol. 97, Issue 23
Entangled quantum state of magnetic dipoles
journal, September 2003
- Ghosh, S.; Rosenbaum, T. F.; Aeppli, G.
- Nature, Vol. 425, Issue 6953
A homogenized energy framework for ferromagnetic hysteresis
journal, July 2006
- Smith, R. C.; Dapino, M. J.; Braun, T. R.
- IEEE Transactions on Magnetics, Vol. 42, Issue 7
Tunable quantum tunnelling of magnetic domain walls
journal, October 2001
- Brooke, J.; Rosenbaum, T. F.; Aeppli, G.
- Nature, Vol. 413, Issue 6856
Quantum and Classical Glass Transitions in
journal, July 2008
- Ancona-Torres, C.; Silevitch, D. M.; Aeppli, G.
- Physical Review Letters, Vol. 101, Issue 5
Logarithmic Corrections to the Landau Specific Heat near the Curie Temperature of the Dipolar Ising Ferromagnet LiTb
journal, May 1975
- Ahlers, Guenter; Kornblit, Avinoam; Guggenheim, H. J.
- Physical Review Letters, Vol. 34, Issue 19
Random field effects in disordered anisotropic antiferromagnets
journal, September 1979
- Fishman, S.; Aharony, A.
- Journal of Physics C: Solid State Physics, Vol. 12, Issue 18
Magnetic properties of lithium rare-earth fluorides: Ferromagnetism in LiEr and LiHo and crystal-field parameters at the rare-earth and Li sites
journal, December 1975
- Hansen, P. E.; Johansson, T.; Nevald, R.
- Physical Review B, Vol. 12, Issue 11
A ferromagnet in a continuously tunable random field
journal, August 2007
- Silevitch, D. M.; Bitko, D.; Brooke, J.
- Nature, Vol. 448, Issue 7153
Equilibrium Random-Field Ising Critical Scattering in the Antiferromagnet
journal, January 1999
- Slanič, Z.; Belanger, D. P.; Fernandez-Baca, J. A.
- Physical Review Letters, Vol. 82, Issue 2
Switchable hardening of a ferromagnet at fixed temperature
journal, January 2010
- Silevitch, D. M.; Aeppli, G.; Rosenbaum, T. F.
- Proceedings of the National Academy of Sciences, Vol. 107, Issue 7
From classical to quantum glass
journal, October 1991
- Wu, Wenhao; Ellman, B.; Rosenbaum, T.
- Physical Review Letters, Vol. 67, Issue 15
Random-Field Effects in Two- and Three-Dimensional Ising Antiferromagnets
journal, February 1982
- Yoshizawa, H.; Cowley, R. A.; Shirane, G.
- Physical Review Letters, Vol. 48, Issue 6
Critical behavior of the random-field Ising model
journal, March 1996
- Gofman, Misha; Adler, Joan; Aharony, Amnon
- Physical Review B, Vol. 53, Issue 10
Nonanalytic Behavior Above the Critical Point in a Random Ising Ferromagnet
journal, July 1969
- Griffiths, Robert B.
- Physical Review Letters, Vol. 23, Issue 1
Random-field-induced destruction of the phase transition of a diluted two-dimensional Ising antiferromagnet:
journal, November 1983
- Ferreira, I. B.; King, A. R.; Jaccarino, V.
- Physical Review B, Vol. 28, Issue 9
Coherent Spin Oscillations in a Disordered Magnet
journal, June 2002
- Ghosh, S.
- Science, Vol. 296, Issue 5576
Quantum Annealing of a Disordered Magnet
journal, April 1999
- Brooke, J.
- Science, Vol. 284, Issue 5415
Theory of the magnetic phase diagram of
journal, October 2004
- Chakraborty, P. B.; Henelius, P.; Kjønsberg, H.
- Physical Review B, Vol. 70, Issue 14
Random-field critical behavior of a Ising system
journal, September 1983
- Belanger, D. P.; King, A. R.; Jaccarino, V.
- Physical Review B, Vol. 28, Issue 5
Quantum Phase Transition of a Magnet in a Spin Bath
journal, April 2005
- Ronnow, H. M.
- Science, Vol. 308, Issue 5720
as a random-field Ising ferromagnet
journal, January 2008
- Schechter, Moshe
- Physical Review B, Vol. 77, Issue 2