Current-driven antivortex core resonance measured by the rectifying effect

Minori Goto; Yukio Nozaki

doi:10.1063/1.4941360

Current-driven antivortex core resonance measured by the rectifying effect

Minori Goto, Yukio Nozaki

Department of Physics

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

1 Citation (Scopus)

Abstract

We demonstrate the current-driven resonance of a single antivortex core confined in a cross-shaped Ni₈₁Fe₁₉ wire. The antivortex core dynamics can be excited purely by spin transfer torque; therefore, it is significant to understand the current-induced magnetization dynamics. The antivortex core resonance can be measured from the frequency dependence of a rectified voltage generated by an alternating current application. We found that the resonance frequency and peak amplitude greatly depend on the external magnetic field. This result is in good agreement with micromagnetic simulation.

Original language	English
Article number	025313
Journal	AIP Advances
Volume	6
Issue number	2
DOIs	https://doi.org/10.1063/1.4941360
Publication status	Published - 2016 Feb

ASJC Scopus subject areas

Physics and Astronomy(all)

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abstract = "We demonstrate the current-driven resonance of a single antivortex core confined in a cross-shaped Ni81Fe19 wire. The antivortex core dynamics can be excited purely by spin transfer torque; therefore, it is significant to understand the current-induced magnetization dynamics. The antivortex core resonance can be measured from the frequency dependence of a rectified voltage generated by an alternating current application. We found that the resonance frequency and peak amplitude greatly depend on the external magnetic field. This result is in good agreement with micromagnetic simulation.",

author = "Minori Goto and Yukio Nozaki",

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AU - Nozaki, Yukio

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PY - 2016/2

Y1 - 2016/2

N2 - We demonstrate the current-driven resonance of a single antivortex core confined in a cross-shaped Ni81Fe19 wire. The antivortex core dynamics can be excited purely by spin transfer torque; therefore, it is significant to understand the current-induced magnetization dynamics. The antivortex core resonance can be measured from the frequency dependence of a rectified voltage generated by an alternating current application. We found that the resonance frequency and peak amplitude greatly depend on the external magnetic field. This result is in good agreement with micromagnetic simulation.

AB - We demonstrate the current-driven resonance of a single antivortex core confined in a cross-shaped Ni81Fe19 wire. The antivortex core dynamics can be excited purely by spin transfer torque; therefore, it is significant to understand the current-induced magnetization dynamics. The antivortex core resonance can be measured from the frequency dependence of a rectified voltage generated by an alternating current application. We found that the resonance frequency and peak amplitude greatly depend on the external magnetic field. This result is in good agreement with micromagnetic simulation.

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Current-driven antivortex core resonance measured by the rectifying effect

Abstract

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