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Title: Geometry effects on magnetization dynamics in circular cross-section wires

Three-dimensional magnetic memory design based on circular-cross section nanowires with modulated diameter is the emerging field of spintronics. The consequences of the mutual interaction between electron spins and local magnetic moments in such non-trivial geometries are still open to debate. This paper describes the theoretical study of domain wall dynamics within such wires subjected to spin polarized current. We used our home-made finite element software to characterize the variety of domain wall dynamical regimes observed for different constriction to wire diameter ratios d/D. Also, we studied how sizeable geometry irregularities modify the internal micromagnetic configuration and the electron spin spatial distribution in the system, the geometrical reasons underlying the additional contribution to the system's nonadiabaticity, and the specific domain wall width oscillations inherent to fully three-dimensional systems.
Authors:
 [1] ;  [2] ;  [2] ;  [2] ;  [2] ;  [3] ;  [2] ;  [1] ;  [2] ;  [2]
  1. Univ. Grenoble Alpes, INAC-SPINTEC, F-38000 Grenoble (France)
  2. (France)
  3. Univ. Grenoble Alpes, I. Neel, F-38000 Grenoble (France)
Publication Date:
OSTI Identifier:
22490722
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 24; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COMPUTER CODES; GEOMETRY; MAGNETIC MOMENTS; MAGNETIZATION; NANOWIRES; SPATIAL DISTRIBUTION; SPIN; SPIN ORIENTATION; WIDTH