Resonant magnetization switching conditions of an exchange-coupled bilayer under spin wave excitation

W. Zhou; T. Yamaji; T. Seki; H. Imamura; K. Takanashi

doi:10.1063/1.4976707

Resonant magnetization switching conditions of an exchange-coupled bilayer under spin wave excitation

W. Zhou, T. Yamaji, T. Seki, H. Imamura, K. Takanashi

Materials Development Division

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

We systematically investigated spin wave-assisted magnetization switching (SWAS) of a L1₀-FePt/Ni₈₁Fe₁₉ (permalloy; Py) exchange-coupled bilayer by using a pulse-like rf field (h_rf) and mapped the switching events in the magnetic field (H)-h_rf frequency (f) plane in order to reveal the switching conditions. Switching occurred only in a limited region followed by the dispersion relationship of the perpendicular standing spin wave modes in the 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 used for selective switching in multilevel recording media.

Original language	English
Article number	082401
Journal	Applied Physics Letters
Volume	110
Issue number	8
DOIs	https://doi.org/10.1063/1.4976707
Publication status	Published - 2017 Feb 20

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.4976707

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abstract = "We systematically investigated spin wave-assisted magnetization switching (SWAS) of a L10-FePt/Ni81Fe19 (permalloy; Py) exchange-coupled bilayer by using a pulse-like rf field (hrf) and mapped the switching events in the magnetic field (H)-hrf frequency (f) plane in order to reveal the switching conditions. Switching occurred only in a limited region followed by the dispersion relationship of the perpendicular standing spin wave modes in the 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 used for selective switching in multilevel recording media.",

author = "W. Zhou and T. Yamaji and T. Seki and H. Imamura and K. Takanashi",

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T1 - Resonant magnetization switching conditions of an exchange-coupled bilayer under spin wave excitation

AU - Zhou, W.

AU - Yamaji, T.

AU - Seki, T.

AU - Imamura, H.

AU - Takanashi, K.

PY - 2017/2/20

Y1 - 2017/2/20

N2 - We systematically investigated spin wave-assisted magnetization switching (SWAS) of a L10-FePt/Ni81Fe19 (permalloy; Py) exchange-coupled bilayer by using a pulse-like rf field (hrf) and mapped the switching events in the magnetic field (H)-hrf frequency (f) plane in order to reveal the switching conditions. Switching occurred only in a limited region followed by the dispersion relationship of the perpendicular standing spin wave modes in the 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 used for selective switching in multilevel recording media.

AB - We systematically investigated spin wave-assisted magnetization switching (SWAS) of a L10-FePt/Ni81Fe19 (permalloy; Py) exchange-coupled bilayer by using a pulse-like rf field (hrf) and mapped the switching events in the magnetic field (H)-hrf frequency (f) plane in order to reveal the switching conditions. Switching occurred only in a limited region followed by the dispersion relationship of the perpendicular standing spin wave modes in the 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 used for selective switching in multilevel recording media.

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Resonant magnetization switching conditions of an exchange-coupled bilayer under spin wave excitation

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