Electric spectroscopy of vortex states and dynamics in magnetic disks

Minori Goto; Hiroshi Hata; Akinobu Yamaguchi; Yoshinobu Nakatani; Takehiro Yamaoka; Yukio Nozaki; Hideki Miyajima

doi:10.1103/PhysRevB.84.064406

Electric spectroscopy of vortex states and dynamics in magnetic disks

Minori Goto, Hiroshi Hata, Akinobu Yamaguchi, Yoshinobu Nakatani, Takehiro Yamaoka, Yukio Nozaki, Hideki Miyajima

Department of Physics

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

29 Citations (Scopus)

Abstract

Spin-polarized radio frequency (RF) currents and RF-Oersted fields resonantly excite a magnetic vortex core confined in a micron-scale soft magnetic disk. In this study, we measured the rectifying voltage spectra caused by the anisotropic magnetoresistance oscillation due to the gyration of the vortex with different polarity and chirality. The measured spectra are presented such that we can determine the vortex properties and strength of the spin torques and Oersted field accurately and directly through analytical calculation.

Original language	English
Article number	064406
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	84
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevB.84.064406
Publication status	Published - 2011 Aug 16

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.84.064406

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AU - Goto, Minori

AU - Hata, Hiroshi

AU - Yamaguchi, Akinobu

AU - Nakatani, Yoshinobu

AU - Yamaoka, Takehiro

AU - Nozaki, Yukio

AU - Miyajima, Hideki

PY - 2011/8/16

Y1 - 2011/8/16

N2 - Spin-polarized radio frequency (RF) currents and RF-Oersted fields resonantly excite a magnetic vortex core confined in a micron-scale soft magnetic disk. In this study, we measured the rectifying voltage spectra caused by the anisotropic magnetoresistance oscillation due to the gyration of the vortex with different polarity and chirality. The measured spectra are presented such that we can determine the vortex properties and strength of the spin torques and Oersted field accurately and directly through analytical calculation.

AB - Spin-polarized radio frequency (RF) currents and RF-Oersted fields resonantly excite a magnetic vortex core confined in a micron-scale soft magnetic disk. In this study, we measured the rectifying voltage spectra caused by the anisotropic magnetoresistance oscillation due to the gyration of the vortex with different polarity and chirality. The measured spectra are presented such that we can determine the vortex properties and strength of the spin torques and Oersted field accurately and directly through analytical calculation.

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Electric spectroscopy of vortex states and dynamics in magnetic disks

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