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Magnetization dynamics of antiferromagnetic metals of PtMn and IrMn driven by a pulsed spin-transfer torque

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Title
Magnetization dynamics of antiferromagnetic metals of PtMn and IrMn driven by a pulsed spin-transfer torque
Author(s)
Kang, Kyuhwe; Lee, Won-Bin; Lee, Dong-Kyu; Lee, Kyung-Jin; Gyung-Min Choi
Publication Date
2021-06
Journal
Applied Physics Letters, v.118, no.25
Publisher
American Institute of Physics Inc.
Abstract
© 2021 Author(s). Published under an exclusive license by AIP Publishing. Antiferromagnets are promising materials for memory devices owing to their ultrafast spin dynamics. For efficient control of antiferromagnets, a direct interaction between the spin current and local magnetization of the sublattice is required. In this study, we demonstrated that a short-pulsed spin current can induce fast dynamics of metallic antiferromagnets of PtMn and IrMn via spin-transfer torque on the magnetization of sublattices. We employed two methods to generate a short-pulsed spin current, namely ultrafast demagnetization of a ferromagnet and optical spin polarization of a heavy metal. The magnetization dynamics were measured using the time-resolved magneto-optical Kerr effect and were analyzed using the Landau-Lifshitz-Gilbert equation. Our results provide important evidence of the direct interaction between the magnetization of antiferromagnets and spin current.
URI
https://pr.ibs.re.kr/handle/8788114/9892
DOI
10.1063/5.0054502
ISSN
0003-6951
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > 1. Journal Papers (저널논문)
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