Electric spectroscopy of vortex states and dynamics in magnetic disks

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

Research output: Contribution to journalArticle

25 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 languageEnglish
Article number064406
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume84
Issue number6
DOIs
Publication statusPublished - 2011 Aug 16

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ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

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