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

doi:10.1109/20.538701

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

Advanced Interdisciplinary Research Division

Research output: Contribution to journal › Article › peer-review

11 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 language	English
Pages (from-to)	3596-3598
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	32
Issue number	5 PART 1
DOIs	https://doi.org/10.1109/20.538701
Publication status	Published - 1996 Dec 1

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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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",

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AU - Nakai, J.

AU - Kikuchi, A.

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AU - Shimatsu, T.

AU - Takahashi, M.

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