Domain nucleation and annihilation in uniformly magnetized state under current pulses in narrow ferromagnetic wires

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

doi:10.1143/JJAP.45.L1322

Domain nucleation and annihilation in uniformly magnetized state under current pulses in narrow ferromagnetic wires

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

Research output: Contribution to journal › Article

25 Citations (Scopus)

Abstract

We investigate the current-driven magnetization dynamics in narrow Permalloy wires by means of Lorentz microscopy and electron holography. Current pulses are found to transform the magnetic structure in the uniformly magnetized state below the Curie temperature. A variety of magnetic states including reversed magnetic domains are randomly obtained in low probability. The dynamics of vortices found in most of observed magnetic states seems to play a key role in triggering the magnetization reversal.

Original language	English
Pages (from-to)	L1322-L1324
Journal	Japanese Journal of Applied Physics, Part 2: Letters
Volume	45
Issue number	46-50
DOIs	https://doi.org/10.1143/JJAP.45.L1322
Publication status	Published - Dec 1 2006
Externally published	Yes

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All Science Journal Classification (ASJC) codes

Engineering(all)
Physics and Astronomy (miscellaneous)
Physics and Astronomy(all)

Cite this

Togawa, Y., Kimura, T., Harada, K., Akashi, T., Matsuda, T., Tonomura, A., & Otani, Y. (2006). Domain nucleation and annihilation in uniformly magnetized state under current pulses in narrow ferromagnetic wires. Japanese Journal of Applied Physics, Part 2: Letters, 45(46-50), L1322-L1324. https://doi.org/10.1143/JJAP.45.L1322

Domain nucleation and annihilation in uniformly magnetized state under current pulses in narrow ferromagnetic wires. / Togawa, Yoshihiko; Kimura, Takashi; Harada, Ken; Akashi, Tetsuya; Matsuda, Tsuyoshi; Tonomura, Akira; Otani, Yoshichika.

In: Japanese Journal of Applied Physics, Part 2: Letters, Vol. 45, No. 46-50, 01.12.2006, p. L1322-L1324.

Research output: Contribution to journal › Article

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Access to Document

10.1143/JJAP.45.L1322