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

Fingerprint

Magnetic recording
magnetic recording
interlayers
Carbon
carbon
recording
Magnetic anisotropy
Signal to noise ratio
Thermodynamic stability
Degradation
Crystals
signal to noise ratios
thermal stability
retarding
degradation
anisotropy
output
crystals

Keywords

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

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Physics and Astronomy (miscellaneous)

Cite this

Reduction of medium noise of Co-Pd multilayered perpendicular magnetic recording media by a thin carbon interlayer. / Sayama, Junichi; Kawaji, Jun; Asahi, Toru; Hokkyo, Jiro; Osaka, Tetsuya.

In: IEEE Transactions on Magnetics, Vol. 39, No. 2 II, 03.2003, p. 1059-1063.

Research output: Contribution to journalArticle

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