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arXiv · 2001.07351

Numerical Computation of Spin-Transfer Torques for Antiferromagnetic Domain walls

Hyeon-Jong Park·Yunboo Jeong·Se-Hyeok Oh·Gyungchoon Go·Jung Hyun Oh·Kyoung-Whan Kim·Hyun-Woo Lee·Kyung-Jin Lee
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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 non-adiabatic spin-transfer torque is a main driving torque for antiferromagnetic domain wall motion. Moreover, the non-adiabatic 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.

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Hyeon-Jong Park, Yunboo Jeong, Se-Hyeok Oh, Gyungchoon Go, Jung Hyun Oh, Kyoung-Whan Kim, Hyun-Woo Lee, Kyung-Jin Lee. 2020-01-21. Numerical Computation of Spin-Transfer Torques for Antiferromagnetic Domain walls. https://doi.org/10.1103/physrevb.101.144431

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