Influence of Initial Growth Layer and Ti Underlayer on Magnetic Properties and Recording Characteristics of Very Thin Films of Evaporated Co-Cr Media

O. Kitakami; Y. Ogawa; H. Fujiwara; F. Kugiya; M. Suzuki

doi:10.1109/20.24498

Influence of Initial Growth Layer and Ti Underlayer on Magnetic Properties and Recording Characteristics of Very Thin Films of Evaporated Co-Cr Media

O. Kitakami, Y. Ogawa, H. Fujiwara, F. Kugiya, M. Suzuki

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

8 Citations (Scopus)

Abstract

A Co-Cr film deposited directly on a substrate has an initial growth layer with low coercivity. However, the existence of a Ti underlayer prevents the formation of such a layer. As a result, Co-Cr film deposited on a Ti underlayer has high perpendicular anisotropy and coercivity even in cases of extremely thin film thickness (200 A). As for the read-write characteristics of Co-Cr thin-film media, the existence of such an initial growth layer greatly improves the reproduced output level. The cause for this is considered to be that the free charges which appear on the back surface of the perpendicular recording layer are reduced and the demagnetization field acting on the recorded magnetization subsequently decreases due to the existence of the initial growth layer.

Original language	English
Pages (from-to)	2607-2611
Number of pages	5
Journal	IEEE Transactions on Magnetics
Volume	25
Issue number	3
DOIs	https://doi.org/10.1109/20.24498
Publication status	Published - 1989 Jan 1
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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title = "Influence of Initial Growth Layer and Ti Underlayer on Magnetic Properties and Recording Characteristics of Very Thin Films of Evaporated Co-Cr Media",

abstract = "A Co-Cr film deposited directly on a substrate has an initial growth layer with low coercivity. However, the existence of a Ti underlayer prevents the formation of such a layer. As a result, Co-Cr film deposited on a Ti underlayer has high perpendicular anisotropy and coercivity even in cases of extremely thin film thickness (200 A). As for the read-write characteristics of Co-Cr thin-film media, the existence of such an initial growth layer greatly improves the reproduced output level. The cause for this is considered to be that the free charges which appear on the back surface of the perpendicular recording layer are reduced and the demagnetization field acting on the recorded magnetization subsequently decreases due to the existence of the initial growth layer.",

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T1 - Influence of Initial Growth Layer and Ti Underlayer on Magnetic Properties and Recording Characteristics of Very Thin Films of Evaporated Co-Cr Media

AU - Kitakami, O.

AU - Ogawa, Y.

AU - Fujiwara, H.

AU - Kugiya, F.

AU - Suzuki, M.

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N2 - A Co-Cr film deposited directly on a substrate has an initial growth layer with low coercivity. However, the existence of a Ti underlayer prevents the formation of such a layer. As a result, Co-Cr film deposited on a Ti underlayer has high perpendicular anisotropy and coercivity even in cases of extremely thin film thickness (200 A). As for the read-write characteristics of Co-Cr thin-film media, the existence of such an initial growth layer greatly improves the reproduced output level. The cause for this is considered to be that the free charges which appear on the back surface of the perpendicular recording layer are reduced and the demagnetization field acting on the recorded magnetization subsequently decreases due to the existence of the initial growth layer.

AB - A Co-Cr film deposited directly on a substrate has an initial growth layer with low coercivity. However, the existence of a Ti underlayer prevents the formation of such a layer. As a result, Co-Cr film deposited on a Ti underlayer has high perpendicular anisotropy and coercivity even in cases of extremely thin film thickness (200 A). As for the read-write characteristics of Co-Cr thin-film media, the existence of such an initial growth layer greatly improves the reproduced output level. The cause for this is considered to be that the free charges which appear on the back surface of the perpendicular recording layer are reduced and the demagnetization field acting on the recorded magnetization subsequently decreases due to the existence of the initial growth layer.

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