Micromagnetics of Hysteresis Loops in CGC Perpendicular Media

A. M. Goodman*, S. J. Greaves, H. Muraoka, K. Miura, Y. Sonobe, Y. Nakamura

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Magnetization reversal mechanisms in coupled granular/continuous perpendicular media are investigated using a three-dimensional micromagnetic model. Hysteresis loops for media with reduced exchange coupling between the continuous and granular layers are found to reverse via a three-stage reversal process. Reversal within soft grains in the granular layer is found to reduce the nucleation field by destabilizing the continuous layer, while hard grains that do not reverse when the continuous layer switches determine the saturation field Hs.

Original languageEnglish
Pages (from-to)2329-2331
Number of pages3
JournalIEEE Transactions on Magnetics
Issue number5 II
Publication statusPublished - 2003 Sept
Externally publishedYes


  • Coupled continuous/granular (CGC) media
  • Exchange coupling
  • Micromagnetic simulation
  • Perpendicular magnetic recording

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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