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Title: Temperature dependence of spin-orbit torque effective fields in the diluted magnetic semiconductor (Ga,Mn)As

We report on a study of the temperature-dependence of current-induced effective magnetic fields due to spin-orbit interactions in the diluted ferromagnetic semiconductor (Ga,Mn)As. Contributions from the effective fields as well as from the anomalous Nernst effect are evident in the difference between transverse resistance measurements as a function of an external magnetic field for opposite orientations of the applied current. We separately extract these contributions by fitting to a model of coherently rotating magnetization. The component of the effective field with Dresselhaus symmetry is substantially enhanced with increasing temperature, while no significant temperature-dependence is observed for the component with Rashba symmetry.
Authors:
; ; ;  [1]
  1. School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD (United Kingdom)
Publication Date:
OSTI Identifier:
22303945
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 1; Other Information: (c) 2014 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; CRYSTAL DEFECTS; CURRENTS; GALLIUM ARSENIDES; L-S COUPLING; MAGNETIC FIELDS; MAGNETIC SEMICONDUCTORS; MAGNETIZATION; MANGANESE COMPOUNDS; NERNST EFFECT; ORIENTATION; SPIN; SYMMETRY; TEMPERATURE DEPENDENCE; TORQUE