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Antiferromagnetic domain wall motion driven by spin-orbit torques

Published

Author(s)

Takayuki Shiino, Se-Hyeok Oh, Paul M. Haney, Seo-Won Lee, Gyungchoon Go, Byong-Guk Park, Kyung-Jin Lee

Abstract

We theoretically investigate dynamics of antiferromagnetic domain walls driven by spin-orbit torques in antiferromagnet/heavy metal bilayers. We show that spin-orbit torques drive antiferromagnetic domain walls much faster than ferromagnetic domain walls. As the domain wall velocity approches the maximum group velocity of spin-waves, the domain wall undergoes the Lorentz contraction and emits spin-waves in terahertz frequecy ranges. This relativistic dynamics of antiferromagnetic domain wall shows a key role of spin-orbit torque in the efficient manipulation of antiferromagnetic spin textures and paves the way for the generation of high frequency signals in antiferromagnets.
Citation
Physical Review Letters
Volume
117
Issue
8

Citation

Shiino, T. , Oh, S. , Haney, P. , Lee, S. , Go, G. , Park, B. and Lee, K. (2016), Antiferromagnetic domain wall motion driven by spin-orbit torques, Physical Review Letters, [online], https://doi.org/10.1103/PhysRevLett.117.087203, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=920685 (Accessed March 3, 2024)
Created August 15, 2016, Updated October 12, 2021