Detection of vortex-core dynamics using current-induced self-bistable rectifying effect

M. Goto, H. Hata, A. Yamaguchi, H. Miyajima, Y. Nakatani, T. Yamaoka, Y. Nozaki

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A magnetic vortex core confined in a micron-scale magnetic disk is resonantly excited by spin-polarized radio-frequency (rf) current and rf field. We show that rectifying voltage spectra caused by the vortex core resonance is dependent on the core polarity. Rectifying voltage spectra are given by the superposition of the polarity-dependent term and the polarity-independent term. The sign of the polarity-dependent rectifying voltage reverses when the sign of polarity P or external field H is reversed. This experimental result can be explained by the anisotropic magnetoresistance effect caused by the vortex core motion.

Original languageEnglish
Article number012080
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 2011 Jan 1


ASJC Scopus subject areas

  • Physics and Astronomy(all)

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