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Toy model for uncommon spin-orbit-driven spin-torque terms. 2017
Laboratoire SPMS, CentraleSupélec/CNRS UMR8580, Université Paris-Saclay, 92295 Châtenay-Malabry Cedex, France. Physics Department, University of Arkansas, Fayetteville, AR 72701, United States of America.
A toy model combining the angular magneto electric (AME) coupling Hamitonian (Mondal et al 2015 Phys. Rev. B 92 100402) with long-range magnetic dipolar interactions is used to investigate spin-torque phenomena in a magnetic spin valve. It is found that such model (1) gives rise to spin-torque expressions that are analogous in form to those of the common spin-transfer torques; but also (2) predicts additional spin-torque terms, which are generated by an electrical current oriented along unconventional, in-plane directions. The magnitude of the AME induced terms is estimated and the conditions under which they may contribute significantly are explored.
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