Magnetization dynamics of antiferromagnetic metals of PtMn and IrMn driven by a pulsed spin-transfer torque
| Autor: | Won Bin Lee, Gyung-Min Choi, Dongkyu Lee, Kyung Jin Lee, Kyuhwe Kang |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Magnetization dynamics Materials science Physics and Astronomy (miscellaneous) Spin polarization Condensed matter physics Demagnetizing field Spin-transfer torque 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Magnetization Exchange bias Ferromagnetism 0103 physical sciences Antiferromagnetism Condensed Matter::Strongly Correlated Electrons 0210 nano-technology |
| Zdroj: | Applied Physics Letters. 118:252407 |
| ISSN: | 1077-3118 0003-6951 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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