Numerical Computation of Spin-Transfer Torques for Antiferromagnetic Domain walls

Title
Numerical Computation of Spin-Transfer Torques for Antiferromagnetic Domain walls
Authors
김경환박현종정윤부오세혁고경춘오정현이현우이경진
Keywords
spin-transfer torque; antiferromagnet; domain wall
Issue Date
2020-04
Publisher
Physical review B, Condensed matter and materials physics
Citation
VOL 101, 144431
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/71296
ISSN
2469-9950
Appears in Collections:
KIST Publication > Article
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