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

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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.
Publisher
AMER INST PHYSICS
Issue Date
2021-06
Language
English
Article Type
Article
Citation

APPLIED PHYSICS LETTERS, v.118, no.25, pp.252407

ISSN
0003-6951
DOI
10.1063/5.0054502
URI
http://hdl.handle.net/10203/287190
Appears in Collection
PH-Journal Papers(저널논문)
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