Micromagnetic study of [formula omitted] granular films by spin-wave Brillouin scattering

A. Kikitsu, A. Murayama, K. Hyomi, C. M. Falco

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

A spin-wave Brillouin scattering study of a [formula omitted] granular magnetic recording medium was made. This film contains ferromagnetic CoPt particles in a [formula omitted] matrix, and has an extremely low medium noise property due to little exchange coupling between magnetic grains. Spin waves of both the propagating surface mode and standing wave mode were found to be excited in granular magnetic films with various microstructures. A possible origin of the spin wave is a magnetostatic coupling between regularly ordered CoPt grains, as reported for artificially patterned magnetic thin films. This result shows two promising features of the [formula omitted] granular film for high density recording medium: It is an ordered media obtained in a self-organizing manner, and it is less influenced by the thermal fluctuation effect, which is a serious problem for current high density magnetic recording.

Original languageEnglish (US)
Pages (from-to)6944-6946
Number of pages3
JournalJournal of Applied Physics
Volume87
Issue number9
DOIs
StatePublished - May 1 2000

Keywords

  • BRILLOUIN EFFECT
  • COBALT ALLOYS
  • GRANULAR MATERIALS
  • MAGNETIC MATERIALS
  • MATRIX MATERIALS
  • MEMORY DEVICES
  • PLATINUM ALLOYS
  • RECORDING SYSTEMS
  • SILICON OXIDES
  • SPIN WAVES
  • THIN FILMS

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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