Current-excited magnetization reversal under in-plane magnetic field in a nanoscaled ferromagnetic wire

Yoshihiko Togawa; Takashi Kimura; Ken Harada; Tsuyoshi Matsuda; Akira Tonomura; Yoshichika Otani; Tetsuya Akashi

doi:10.1063/1.2828865

Current-excited magnetization reversal under in-plane magnetic field in a nanoscaled ferromagnetic wire

Yoshihiko Togawa, Takashi Kimura, Ken Harada, Tsuyoshi Matsuda, Akira Tonomura, Yoshichika Otani, Tetsuya Akashi

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

30 Citations (Scopus)

Abstract

We microscopically demonstrate that the magnetic domain is controllably nucleated and erased in the uniformly magnetized wire using a current pulse in small magnetic fields. Lorentz microscopy is performed in Permalloy nanowires with in-plane anisotropy. The stochastic nature of the magnetization reversal due to spin wave and thermal excitations in the absence of magnetic field completely disappears and turns into deterministic in the presence of small magnetic field, which enables the magnetization reversal control. We interpret that the phenomena are associated with Zeeman energy stabilization.

Original language	English
Article number	012505
Journal	Applied Physics Letters
Volume	92
Issue number	1
DOIs	https://doi.org/10.1063/1.2828865
Publication status	Published - 2008
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.2828865

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title = "Current-excited magnetization reversal under in-plane magnetic field in a nanoscaled ferromagnetic wire",

abstract = "We microscopically demonstrate that the magnetic domain is controllably nucleated and erased in the uniformly magnetized wire using a current pulse in small magnetic fields. Lorentz microscopy is performed in Permalloy nanowires with in-plane anisotropy. The stochastic nature of the magnetization reversal due to spin wave and thermal excitations in the absence of magnetic field completely disappears and turns into deterministic in the presence of small magnetic field, which enables the magnetization reversal control. We interpret that the phenomena are associated with Zeeman energy stabilization.",

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T1 - Current-excited magnetization reversal under in-plane magnetic field in a nanoscaled ferromagnetic wire

AU - Togawa, Yoshihiko

AU - Kimura, Takashi

AU - Harada, Ken

AU - Matsuda, Tsuyoshi

AU - Tonomura, Akira

AU - Otani, Yoshichika

AU - Akashi, Tetsuya

PY - 2008

Y1 - 2008

N2 - We microscopically demonstrate that the magnetic domain is controllably nucleated and erased in the uniformly magnetized wire using a current pulse in small magnetic fields. Lorentz microscopy is performed in Permalloy nanowires with in-plane anisotropy. The stochastic nature of the magnetization reversal due to spin wave and thermal excitations in the absence of magnetic field completely disappears and turns into deterministic in the presence of small magnetic field, which enables the magnetization reversal control. We interpret that the phenomena are associated with Zeeman energy stabilization.

AB - We microscopically demonstrate that the magnetic domain is controllably nucleated and erased in the uniformly magnetized wire using a current pulse in small magnetic fields. Lorentz microscopy is performed in Permalloy nanowires with in-plane anisotropy. The stochastic nature of the magnetization reversal due to spin wave and thermal excitations in the absence of magnetic field completely disappears and turns into deterministic in the presence of small magnetic field, which enables the magnetization reversal control. We interpret that the phenomena are associated with Zeeman energy stabilization.

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JF - Applied Physics Letters

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M1 - 012505

ER -

Current-excited magnetization reversal under in-plane magnetic field in a nanoscaled ferromagnetic wire

Abstract

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