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 September 20, 2024)
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Antiferromagnetic domain wall motion driven by spin-orbit torques
Published
Author(s)
Takayuki Shiino, Se-Hyeok Oh, , 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
Pub Type
Journals
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Created August 15, 2016, Updated October 12, 2021