Measurement of Down-Track Correlation for Perpendicular Magnetic Media with Various Inter-Granular Exchange Coupling

Kenji Miura, Daisuke Sudo, Mitsuhiro Hashimoto, Hiroaki Muraoka, Hajime Aoi, Yoshihisa Nakamura

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

In order to attain high track density, track-edge noise was studied in conjunction with the fine magnetic structure of perpendicular media. The track-edge noise was increased in media with stronger exchange coupling. The down-track correlation length was measured and compared with the cross-track correlation length. The track-edge noise and correlation length depended upon the inter-granular exchange coupling of the media. Magnetic isolation of grains and steep head field gradient along the cross-track direction is expected to improve the write resolution at the track-edges.

Original languageEnglish
Pages (from-to)2261-2263
Number of pages3
JournalIEEE Transactions on Magnetics
Volume42
Issue number10
DOIs
Publication statusPublished - 2006 Oct

Keywords

  • Down-track correlation length
  • magnetic cluster
  • perpendicular magnetic recording
  • track density
  • track-edge noise

ASJC Scopus subject areas

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

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