Effects of grain size and intergranular coupling on recording characteristics in cocrta media

H. Sato, J. Nakai, A. Kikuchi, H. Mitsuya, T. Shimatsu, M. Takahashi

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The effects of grain size on intergranular magnetostatic coupling and on recording property are discussed for the C°85.5Crll>,5Ta4 and CoCrTas thin film media fabricated under the ultra clean sputtering process (UC-process). S/Nfm increases not only with the increment in Hc/H|jsrain but also with the decrement in the grain diameter in both CoCrTa media. In the media with high Hc/HkSrain value more than 0.35, S/Nm drastically Increases with decrease in the grain diameter, which corresponds to the decrease in the dispersion of magnetic field strength from recorded bits. To maintain high Hc/HkSrain value more than 0.35 even in the media with small grain size below 10 nm, the selection of alloy composition which gives a small 4:tMs/ Ingrain va,ue of icss than 1.0 is required

Original languageEnglish
Pages (from-to)3596-3598
Number of pages3
JournalIEEE Transactions on Magnetics
Volume32
Issue number5 PART 1
DOIs
Publication statusPublished - 1996 Dec 1

ASJC Scopus subject areas

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

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