Intrinsic nonadiabatic topological torque in magnetic skyrmions and vortices
KAUST DepartmentPhysical Sciences and Engineering (PSE) Division
Materials Science and Engineering Program
KAUST Grant NumberOSR-CRG URF/1/1693-01
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AbstractWe propose that topological spin currents flowing in topologically nontrivial magnetic textures, such as magnetic skyrmions and vortices, produce an intrinsic nonadiabatic torque of the form Tt∼[(∂xm×∂ym)·m]∂ym. We show that this torque, which is absent in one-dimensional domain walls and/or nontopological textures, is responsible for the enhanced nonadiabaticity parameter observed in magnetic vortices compared to one-dimensional textures. The impact of this torque on the motion of magnetic skyrmions is expected to be crucial, especially to determine their robustness against defects and pinning centers.
CitationAkosa CA, Ndiaye PB, Manchon A (2017) Intrinsic nonadiabatic topological torque in magnetic skyrmions and vortices. Physical Review B 95. Available: http://dx.doi.org/10.1103/PhysRevB.95.054434.
SponsorsC.A. and A.M. acknowledges financial support from the King Abdullah University of Science and Technology (KAUST) through the Award No. OSR-CRG URF/1/1693-01 from the Office of Sponsored Research (OSR). The authors thank M. Kläui, Kyung-Jin Lee, Gen Tatara, A. Bisig, and A. Abbout for inspiring discussions.
PublisherAmerican Physical Society (APS)
JournalPhysical Review B