Intrinsic nonadiabatic topological torque in magnetic skyrmions and vortices

Collins Ashu Akosa; Papa Birame Ndiaye; Aurelien Manchon

doi:10.1103/PhysRevB.95.054434

Intrinsic nonadiabatic topological torque in magnetic skyrmions and vortices

Collins Ashu Akosa, Papa Birame Ndiaye, Aurelien Manchon

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

We 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.

Original language	English (US)
Journal	Physical Review B
Volume	95
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevB.95.054434
State	Published - Feb 28 2017

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): OSR-CRG URF/1/1693-01
Acknowledgements: C.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.

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10.1103/PhysRevB.95.054434

https://repository.kaust.edu.sa/bitstream/10754/623639/1/2017_PRB_Akosa.pdf

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title = "Intrinsic nonadiabatic topological torque in magnetic skyrmions and vortices",

abstract = "We 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.",

author = "Akosa, {Collins Ashu} and Ndiaye, {Papa Birame} and Aurelien Manchon",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledged KAUST grant number(s): OSR-CRG URF/1/1693-01 Acknowledgements: C.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. Kl{\"a}ui, Kyung-Jin Lee, Gen Tatara, A. Bisig, and A. Abbout for inspiring discussions.",

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doi = "10.1103/PhysRevB.95.054434",

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AU - Ndiaye, Papa Birame

AU - Manchon, Aurelien

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N2 - We 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.

AB - We 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.

UR - http://hdl.handle.net/10754/623639

UR - https://journals.aps.org/prb/abstract/10.1103/PhysRevB.95.054434

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VL - 95

JO - Physical Review B

JF - Physical Review B

IS - 5

ER -

Intrinsic nonadiabatic topological torque in magnetic skyrmions and vortices

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