Electrical detection of vortex core polarity in ferromagnetic disk

Kunihiro Nakano, Daichi Chiba, Koji Sekiguchi, Shinya Kasai, Norikazu Ohshima, Kensuke Kobayashi, Teruo Ono

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


The current-induced dynamics of a vortex core in a ferromagnetic disk was investigated by using a three-terminal device with the magnetic tunnel junction (MTJ). The gyroscopic motion of a core was detected as the periodic oscillation of the output signal from the MTJ. It was found that the amplitude of the output signal is determined by the core polarity, which can be used for electrical reading of the bit information of the vortex core memory cell.

Original languageEnglish
Article number053001
JournalApplied Physics Express
Issue number5
Publication statusPublished - 2010 May 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)


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