Reduction of medium noise of Co-Pd multilayered perpendicular magnetic recording media by a thin carbon interlayer

Junichi Sayama, Jun Kawaji, Toru Asahi, Jiro Hokkyo, Tetsuya Osaka

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We report the effect of introducing a thin carbon interlayer to the recording layer on the read-write characteristics of Co-Pd multilayered perpendicular magnetic recording media. A 1-nm-thick carbon interlayer markedly reduced the medium noise and improved the output resolution, D50. As a result, the signal-to-noise ratio at the recording density of 200 kFRPI for the medium was higher by 5 dB than that for the medium without the interlayer. We attribute these improvements in read-write characteristics to a decrease in the crystal grain diameter of the recording layer, resulting in suppression of the transition fluctuation of recorded bits. The Co-Pd multilayered perpendicular magnetic recording medium with carbon interlayer has a high thermal stability despite a slight degradation of perpendicular magnetic anisotropy.

Original languageEnglish
Pages (from-to)1059-1063
Number of pages5
JournalIEEE Transactions on Magnetics
Volume39
Issue number2 II
DOIs
Publication statusPublished - 2003 Mar 1

Keywords

  • Carbon interlayer
  • Co-Pd multilayer
  • Medium noise
  • Perpendicular magnetic recording

ASJC Scopus subject areas

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

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