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Title: Steady-state domain wall motion driven by adiabatic spin-transfer torque with assistance of microwave field

We have studied the current-induced displacement of a 180° Bloch wall by means of micromagnetic simulation and analytical approach. It is found that the adiabatic spin-transfer torque can sustain a steady-state domain wall (DW) motion in the direction opposite to that of the electron flow without Walker Breakdown when a transverse microwave field is applied. This kind of motion is very sensitive to the microwave frequency and can be resonantly enhanced by exciting the domain wall thickness oscillation mode. A one-dimensional analytical model was established to account for the microwave-assisted wall motion. These findings may be helpful for reducing the critical spin-polarized current density and designing DW-based spintronic devices.
Authors:
; ; ; ;  [1] ;  [2] ;  [3]
  1. School of Physics and Electronics, Central South University, Changsha 410083 (China)
  2. Department of Physics, National University of Defense Technology, Changsha 410073 (China)
  3. Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou 215123 (China)
Publication Date:
OSTI Identifier:
22253147
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 26; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BLOCH WALL; BREAKDOWN; CURRENT DENSITY; DESIGN; ELECTRONS; MICROWAVE RADIATION; SIMULATION; SPIN; SPIN ORIENTATION; STEADY-STATE CONDITIONS; THICKNESS; TORQUE