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Title: Magnetism in curved geometries

Extending planar two-dimensional structures into the three-dimensional space has become a general trend in multiple disciplines, including electronics, photonics, plasmonics and magnetics. This approach provides means to modify conventional or to launch novel functionalities by tailoring the geometry of an object, e.g. its local curvature. In a generic electronic system, curvature results in the appearance of scalar and vector geometric potentials inducing anisotropic and chiral effects. In the specific case of magnetism, even in the simplest case of a curved anisotropic Heisenberg magnet, the curvilinear geometry manifests two exchange-driven interactions, namely effective anisotropy and antisymmetric exchange, i.e. Dzyaloshinskii–Moriya-like interaction. As a consequence, a family of novel curvature-driven effects emerges, which includes magnetochiral effects and topologically induced magnetization patterning, resulting in theoretically predicted unlimited domain wall velocities, chirality symmetry breaking and Cherenkov-like effects for magnons. The broad range of altered physical properties makes these curved architectures appealing in view of fundamental research on e.g. skyrmionic systems, magnonic crystals or exotic spin configurations. In addition to these rich physics, the application potential of three-dimensionally shaped objects is currently being explored as magnetic field sensorics for magnetofluidic applications, spin-wave filters, advanced magneto-encephalography devices for diagnosis of epilepsy or for energy-efficient racetrack memory devices.more » Finally, these recent developments ranging from theoretical predictions over fabrication of three-dimensionally curved magnetic thin films, hollow cylinders or wires, to their characterization using integral means as well as the development of advanced tomography approaches are in the focus of this review.« less
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [4] ;  [6] ;  [7]
  1. IFW Dresden, Dresden (Germany); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Santa Cruz, CA (United States)
  3. Helmholtz-Zentrum Berlin fur Materialien und Energie GmbH, Berlin (Germany)
  4. Bogolyubov Institute for Theoretical Physics of National Academy of Sciences of Ukraine, Kyiv (Ukraine)
  5. Taras Shevchenko National Univ. of Kyiv, Kyiv (Ukraine)
  6. IFW Dresden, Dresden (Germany); Chemnitz Univ. of Technology, Chemnitz (Germany)
  7. IFW Dresden, Dresden (Germany); Helmholtz-Zentrum Dresden-Rossendorf c.V., Dresden (Germany)
Publication Date:
Report Number(s):
LBNL-1006772
Journal ID: ISSN 0022-3727; ir:1006772; TRN: US1701712
Type:
Accepted Manuscript
Journal Name:
Journal of Physics. D, Applied Physics
Additional Journal Information:
Journal Volume: 49; Journal Issue: 36; Journal ID: ISSN 0022-3727
Publisher:
IOP Publishing
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
Materials Sciences Division; USDOE
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; magnetic helix; magnetic shell; Dzyaloshinskii–Moriya interaction; curvilinear magnetism; shapeable magnetoelectronics; curved magnetic thin films; magnetic tubes
OSTI Identifier:
1338939