Electrical detection of vortex core polarity in ferromagnetic disk

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

doi:10.1143/APEX.3.053001

Electrical detection of vortex core polarity in ferromagnetic disk

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

Department of Physics

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

12 Citations (Scopus)

Abstract

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 language	English
Article number	053001
Journal	Applied Physics Express
Volume	3
Issue number	5
DOIs	https://doi.org/10.1143/APEX.3.053001
Publication status	Published - 2010 May 1

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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AU - Nakano, Kunihiro

AU - Chiba, Daichi

AU - Sekiguchi, Koji

AU - Kasai, Shinya

AU - Ohshima, Norikazu

AU - Kobayashi, Kensuke

AU - Ono, Teruo

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AB - 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.

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Electrical detection of vortex core polarity in ferromagnetic disk

Abstract

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