Stochastic nature of current-excited magnetic domain and domain wall dynamics microscopically investigated by Lorentz microscopy

Yoshihiko Togawa, Takashi Kimura, Ken Harada, Akira Tonomura, Yoshichika Otani

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We microscopically investigate the dynamics of magnetic domains and domain walls induced by a current pulse in Permalloy narrow wires by means of Lorentz microscopy and simultaneous transport measurement. A variety of magnetic domain and domain wall dynamics are induced as a function of current density flowing into the wire and wire resistance. Important finding is that observed magnetic domain wall displacement and domain nucleation explicitly exhibit stochastic nature, indicating that the magnetic state in the wire is hardly controlled by using solely the current pulse. However, the application of small in-plane magnetic field changes drastically the nature into deterministic, which effectively improves controllability of the magnetic domain and domain wall dynamics using current.

Original languageEnglish
Title of host publicationTENCON 2010 - 2010 IEEE Region 10 Conference
Pages122-125
Number of pages4
DOIs
Publication statusPublished - Dec 1 2010
Event2010 IEEE Region 10 Conference, TENCON 2010 - Fukuoka, Japan
Duration: Nov 21 2010Nov 24 2010

Other

Other2010 IEEE Region 10 Conference, TENCON 2010
Country/TerritoryJapan
CityFukuoka
Period11/21/1011/24/10

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Computer Science Applications

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