Numerical computation of spin-transfer torques for antiferromagnetic domain walls

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We numerically compute current-induced spin-transfer torques for antiferromagnetic domain walls, based on a linear response theory in a tight-binding model. We find that, unlike for ferromagnetic domain-wall motion, the contribution of adiabatic spin torque to antiferromagnetic domain-wall motion is negligible, consistent with previous theories. As a result, the nonadiabatic spin-transfer torque is a main driving torque for antiferromagnetic domain-wall motion. Moreover, the nonadiabatic spin-transfer torque for narrower antiferromagnetic domain walls increases more rapidly than that for ferromagnetic domain walls, which is attributed to the enhanced spin mistracking process for antiferromagnetic domain walls.
Publisher
AMER PHYSICAL SOC
Issue Date
2020-04
Language
English
Article Type
Article
Citation

PHYSICAL REVIEW B, v.101, no.14

ISSN
2469-9950
DOI
10.1103/PhysRevB.101.144431
URI
http://hdl.handle.net/10203/277394
Appears in Collection
PH-Journal Papers(저널논문)
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