Coupled-mode excitations induced in an antiferromagnetically coupled multilayer by spin-transfer torque

Takeshi Seki; Hiroyuki Tomita; Masashi Shiraishi; Teruya Shinjo; Yoshishige Suzuki

doi:10.1143/APEX.3.033001

Coupled-mode excitations induced in an antiferromagnetically coupled multilayer by spin-transfer torque

Takeshi Seki, Hiroyuki Tomita, Masashi Shiraishi, Teruya Shinjo, Yoshishige Suzuki

IMR - Materials Development Division

Osaka University

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

15 Citations (Scopus)

Abstract

Auto-oscillation of the magnetization in an Fe/Cr/Fe antiferromagnetically coupled multilayer was induced by spin-transfer torque. The acoustic mode, a coupled mode in the multilayer, was excited when a dc bias current was applied at relatively small magnetic fields. The external magnetic field dependence of the oscillation frequency is explained by a macrospin model with an antiferromagnetic coupling field. The excitation of the optical mode is also discussed.

Original language	English
Article number	033001
Journal	Applied Physics Express
Volume	3
Issue number	3
DOIs	https://doi.org/10.1143/APEX.3.033001
Publication status	Published - 2010 Mar

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abstract = "Auto-oscillation of the magnetization in an Fe/Cr/Fe antiferromagnetically coupled multilayer was induced by spin-transfer torque. The acoustic mode, a coupled mode in the multilayer, was excited when a dc bias current was applied at relatively small magnetic fields. The external magnetic field dependence of the oscillation frequency is explained by a macrospin model with an antiferromagnetic coupling field. The excitation of the optical mode is also discussed.",

author = "Takeshi Seki and Hiroyuki Tomita and Masashi Shiraishi and Teruya Shinjo and Yoshishige Suzuki",

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AU - Seki, Takeshi

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AU - Shiraishi, Masashi

AU - Shinjo, Teruya

AU - Suzuki, Yoshishige

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N2 - Auto-oscillation of the magnetization in an Fe/Cr/Fe antiferromagnetically coupled multilayer was induced by spin-transfer torque. The acoustic mode, a coupled mode in the multilayer, was excited when a dc bias current was applied at relatively small magnetic fields. The external magnetic field dependence of the oscillation frequency is explained by a macrospin model with an antiferromagnetic coupling field. The excitation of the optical mode is also discussed.

AB - Auto-oscillation of the magnetization in an Fe/Cr/Fe antiferromagnetically coupled multilayer was induced by spin-transfer torque. The acoustic mode, a coupled mode in the multilayer, was excited when a dc bias current was applied at relatively small magnetic fields. The external magnetic field dependence of the oscillation frequency is explained by a macrospin model with an antiferromagnetic coupling field. The excitation of the optical mode is also discussed.

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Coupled-mode excitations induced in an antiferromagnetically coupled multilayer by spin-transfer torque

Abstract

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