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Toy model for uncommon spin-orbit-driven spin-torque terms.

Charles Paillard1,2, Raymond Walter2,3,4, Surendra Singh2

  • 1Laboratoire SPMS, CentraleSupélec/CNRS UMR8580, Université Paris-Saclay, 92295 Châtenay-Malabry Cedex, France.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|May 19, 2017
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Summary
This summary is machine-generated.

This study explores spin-torque phenomena in magnetic spin valves using a model with angular magneto electric (AME) coupling. It reveals new spin-torque terms arising from unconventional current directions.

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Area of Science:

  • Condensed Matter Physics
  • Spintronics
  • Materials Science

Background:

  • Spin-transfer torque is a key phenomenon in spintronics.
  • Angular magneto electric (AME) coupling offers novel ways to control magnetism.
  • Understanding spin-torque in magnetic spin valves is crucial for device applications.

Purpose of the Study:

  • To investigate spin-torque phenomena in magnetic spin valves.
  • To incorporate angular magneto electric (AME) coupling and magnetic dipolar interactions into a theoretical model.
  • To explore novel spin-torque terms induced by electrical currents.

Main Methods:

  • Development of a toy model combining AME coupling Hamiltonian with magnetic dipolar interactions.
  • Analysis of spin-torque expressions derived from the model.
  • Estimation of the magnitude of AME-induced spin-torque terms.

Main Results:

  • The model yields spin-torque expressions similar to conventional spin-transfer torques.
  • Additional spin-torque terms are predicted for currents along unconventional in-plane directions.
  • The significance of AME-induced terms under specific conditions is explored.

Conclusions:

  • The combined model provides a framework for understanding complex spin-torque dynamics.
  • New avenues for manipulating magnetic states in spin valves via electrical currents are identified.
  • The study highlights the potential of AME coupling in spintronic device design.