Direct correlation of reversal rate dynamics to domain configurations in micron-sized permalloy elements

J. W. Lau, G. F. Neumark, M. Beleggia, M. A. Schofield, Y. Zhu

Research output: Contribution to journalConference articleResearchpeer-review

Abstract

The distribution of states upon the removal of applied magnetic field in an array of 7.5×7.5 μ m2 permalloy square elements, as observed by transmission electron microscopy in Lorentz mode, shows a predominance of two states: the vortex state and the seven-domain state. The distributional dependence of these two states on the rate of change of the reversal field is established. Micromagnetic simulations suggest that vortex nucleation and the subsequent domain-wall propagation are the two primary mechanisms for magnetization reversal. The kinetics of the two pathways is examined in a manner that conforms to the observed distribution of states. © 2005 American Institute of Physics.
Original languageEnglish
Article number10E702
JournalJournal of Applied Physics
Volume97
Issue number10
ISSN0021-8979
DOIs
Publication statusPublished - 2005
Externally publishedYes
Event49th Annual Conference on Magnetism and Magnetic Materials - Jacksonville, FL, United States
Duration: 7 Nov 200411 Nov 2004
Conference number: 49

Conference

Conference49th Annual Conference on Magnetism and Magnetic Materials
Number49
Country/TerritoryUnited States
CityJacksonville, FL
Period07/11/200411/11/2004

Keywords

  • Computer simulation
  • Ground state
  • Magnetic domains
  • Magnetic field effects
  • Magnetization
  • Transmission electron microscopy
  • Magnetic recording
  • T
  • X

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