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

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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 languageEnglish
Pages (from-to)L1322-L1324
JournalJapanese Journal of Applied Physics, Part 2: Letters
Volume45
Issue number46-50
DOIs
Publication statusPublished - Dec 1 2006
Externally publishedYes

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All Science Journal Classification (ASJC) codes

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

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