Resonant magnetization switching conditions of an exchange-coupled bilayer under spin wave excitation
| Autor: | Toshiki Yamaji, Takeshi Seki, Hiroshi Imamura, Koki Takanashi, Weinan Zhou |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Permalloy Condensed Matter - Materials Science Materials science Physics and Astronomy (miscellaneous) Condensed matter physics Bilayer Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Magnetic field Magnetization Spin wave 0103 physical sciences Perpendicular 0210 nano-technology Excitation Spin-½ |
| Zdroj: | Applied Physics Letters. 110:082401 |
| ISSN: | 1077-3118 0003-6951 |
| DOI: | 10.1063/1.4976707 |
| Popis: | We systematically investigated the spin wave-assisted magnetization switching (SWAS) of a L10-FePt / Ni81Fe19 (Permalloy; Py) exchange-coupled bilayer using a pulse-like rf field (hrf) and mapped the switching events in the magnetic field (H) - hrf frequency (f) plane to reveal the switching conditions. The switching occurred only in a limited region following the dispersion relationship of the perpendicular standing spin wave (PSSW) modes in Py. The results indicate that SWAS is a resonant magnetization switching process, which is different from the conventional microwave assisted switching, and has the potential to be applied to selective switching for multilevel recording media. Comment: 11 pages, 4 figures |
| Databáze: | OpenAIRE |
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