Spin transfer torque in lateral spin-valve structure evaluated from field-excited ferromagnetic resonant linewidth

Yukio Nozaki; Sho D. Watanabe; Takafumi Kobayashi; Tomoki Tanazawa

doi:10.7567/APEX.8.043001

Spin transfer torque in lateral spin-valve structure evaluated from field-excited ferromagnetic resonant linewidth

Yukio Nozaki, Sho D. Watanabe, Takafumi Kobayashi, Tomoki Tanazawa

Department of Physics

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

1 Citation (Scopus)

Abstract

Modulation of ferromagnetic resonance (FMR) linewidth owing to a spin transfer torque (STT) caused by the absorption of a pure spin current in a permalloy nanowire is demonstrated. To exclude the STT induced by the spin-polarized current, the pure spin current was produced using a lateral spin-valve structure. Self-homodyne FMR detection without applying an external sense current was used for minimizing the influence of Joule heating on the FMR linewidth. The linear variation of the FMR linewidth caused by the STT was clearly observed when the electrical current generating the pure spin current was below 1 mA.

Original language	English
Article number	043001
Journal	Applied Physics Express
Volume	8
Issue number	4
DOIs	https://doi.org/10.7567/APEX.8.043001
Publication status	Published - 2015 Apr 1

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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abstract = "Modulation of ferromagnetic resonance (FMR) linewidth owing to a spin transfer torque (STT) caused by the absorption of a pure spin current in a permalloy nanowire is demonstrated. To exclude the STT induced by the spin-polarized current, the pure spin current was produced using a lateral spin-valve structure. Self-homodyne FMR detection without applying an external sense current was used for minimizing the influence of Joule heating on the FMR linewidth. The linear variation of the FMR linewidth caused by the STT was clearly observed when the electrical current generating the pure spin current was below 1 mA.",

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AU - Nozaki, Yukio

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AU - Kobayashi, Takafumi

AU - Tanazawa, Tomoki

PY - 2015/4/1

Y1 - 2015/4/1

N2 - Modulation of ferromagnetic resonance (FMR) linewidth owing to a spin transfer torque (STT) caused by the absorption of a pure spin current in a permalloy nanowire is demonstrated. To exclude the STT induced by the spin-polarized current, the pure spin current was produced using a lateral spin-valve structure. Self-homodyne FMR detection without applying an external sense current was used for minimizing the influence of Joule heating on the FMR linewidth. The linear variation of the FMR linewidth caused by the STT was clearly observed when the electrical current generating the pure spin current was below 1 mA.

AB - Modulation of ferromagnetic resonance (FMR) linewidth owing to a spin transfer torque (STT) caused by the absorption of a pure spin current in a permalloy nanowire is demonstrated. To exclude the STT induced by the spin-polarized current, the pure spin current was produced using a lateral spin-valve structure. Self-homodyne FMR detection without applying an external sense current was used for minimizing the influence of Joule heating on the FMR linewidth. The linear variation of the FMR linewidth caused by the STT was clearly observed when the electrical current generating the pure spin current was below 1 mA.

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Spin transfer torque in lateral spin-valve structure evaluated from field-excited ferromagnetic resonant linewidth

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