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Title: Domain wall oscillations induced by spin torque in magnetic nanowires

Using micromagnetic simulations, the effects of the non-adiabatic spin torque (β) and the geometry of nanowires on domain wall (DW) dynamics are investigated. For the case of in-plane anisotropy nanowire, it is observed that the type of DW and its dynamics depends on its dimension. For a fixed length, the critical switching current decreases almost exponentially with the width W, while the DW speed becomes faster for larger W. For the case of perpendicular anisotropy nanowire, it was observed that DW dynamics depends strongly on β. For small values of β, oscillations of DW around the center of nanowire were revealed even after the current is switched off. In addition to nanowire geometry and intrinsic material properties, β could provide a way to control DW dynamics.
Authors:
 [1] ;  [2]
  1. Department of Physics, Sultan Qaboos University, P.O. Box 36, PC 123, Muscat (Oman)
  2. Department of Physics, University of York, York YO10 5DD (United Kingdom)
Publication Date:
OSTI Identifier:
22413039
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 5; 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; ANISOTROPY; COMPUTERIZED SIMULATION; DOMAIN STRUCTURE; ELECTRIC CURRENTS; MAGNETISM; NANOWIRES; OSCILLATIONS; SPIN; SWITCHES; TORQUE; VELOCITY