Effect of N2 additive gas during sputtering on magnetic properties and microstructure of CoB/Pd multilayered media

Toru Asahi, Mutsumi Tanaka, Junichi Sayama, Jun Kawaji, Satoshi Matsunuma, Tetsuya Osaka

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Effects of N2 additive gas and/or substrate heating during the sputtering of [CoB/Pd]20 multilayered films on the magnetic properties and microstructure were investigated. The [CoB/Pd]20 film fabricated at 20 °C by adding N2 gas during sputtering possessed the finest grain size and the smallest magnetic cluster size among media fabricated in this study although the film sputter-deposited at 260 °C by adding N2 gas exhibited the weakest intergranular exchange coupling. It was revealed that the double-layered perpendicular magnetic recording medium that consisted of the [CoB/Pd]20 film fabricated at 20 °C by adding N2 gas exhibited the highest signal-to-noise ratio in the read-write characteristics.

Original languageEnglish
Pages (from-to)199-203
Number of pages5
JournalJournal of Magnetism and Magnetic Materials
Volume287
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - 2005 Feb 1

Keywords

  • Additive N gas
  • CoB/Pd multilayered film
  • Perpendicular magnetic recording medium

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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