Monte Carlo simulation for magnetic dynamic processes of micromagnetic clusters with local disorder

Katsuhiko Yamaguchi, Shinya Tanaka, Osamu Nittono, Koji Yamada, Toshiyuki Takagi

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Magnetic dynamic processes for micromagnetic clusters with local disorder of crystal structure were simulated by pseudo-non-equilibrial Monte Carlo method. The magnetic field dependence of magnetization showed a little dip at zero magnetic fields. The dip becomes larger as the number of dislocations increase. Simulated Barkhausen noise at the dip was stronger than ordinal-simulated Barkhausen noise around coercivity. The snapshot of spins shows a magnetic fluctuation around dislocations. The result suggests a possibility of a new measurement with high sensitivity, to detect the deformation of micromagnetic clusters.

Original languageEnglish
Pages (from-to)251-255
Number of pages5
JournalPhysica B: Condensed Matter
Volume372
Issue number1-2
DOIs
Publication statusPublished - 2006 Feb 1

Keywords

  • Barkhausen noise
  • Magnetic fluctuation
  • Magnetic hysteresis
  • Micromagnetic clusters

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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