A Study on Electroless Plating of Cobalt Alloy Films for Perpendicular Recording

Tetsuya Osaka; Naoki Kasai; Ichiro Koiwa

doi:10.1149/1.2119805

A Study on Electroless Plating of Cobalt Alloy Films for Perpendicular Recording

Tetsuya Osaka, Naoki Kasai, Ichiro Koiwa

Research Organization for Nano & Life Innovation

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

11 Citations (Scopus)

Abstract

An electroless plating bath for the preparation of perpendicular recording media was developed. It was found that the hcp structure of Co-P is oriented normal to the film plane with the Mn codeposition into the films. First, an ammoniacal malonate-malate bath, containing MnSO₄, was selected. Nickel was codeposited into the films in order to decrease the saturation magnetization, Ms, since low Ms is necessary to decrease the demagnetizing field. Second, effects were investigated for three factors (i.e., MnSO₄ concentration, bath pH, and NiSO₄ concentration) causing the c-axis perpendicular orientation of the film properties. Optimum plating conditions for perpendicular recording media were thus determined.

Original language	English
Pages (from-to)	790-794
Number of pages	5
Journal	Journal of the Electrochemical Society
Volume	130
Issue number	4
DOIs	https://doi.org/10.1149/1.2119805
Publication status	Published - 1983 Apr

Keywords

electroless
ferromagnetism

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Renewable Energy, Sustainability and the Environment
Surfaces, Coatings and Films
Electrochemistry
Materials Chemistry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1149/1.2119805

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N2 - An electroless plating bath for the preparation of perpendicular recording media was developed. It was found that the hcp structure of Co-P is oriented normal to the film plane with the Mn codeposition into the films. First, an ammoniacal malonate-malate bath, containing MnSO4, was selected. Nickel was codeposited into the films in order to decrease the saturation magnetization, Ms, since low Ms is necessary to decrease the demagnetizing field. Second, effects were investigated for three factors (i.e., MnSO4 concentration, bath pH, and NiSO4 concentration) causing the c-axis perpendicular orientation of the film properties. Optimum plating conditions for perpendicular recording media were thus determined.

AB - An electroless plating bath for the preparation of perpendicular recording media was developed. It was found that the hcp structure of Co-P is oriented normal to the film plane with the Mn codeposition into the films. First, an ammoniacal malonate-malate bath, containing MnSO4, was selected. Nickel was codeposited into the films in order to decrease the saturation magnetization, Ms, since low Ms is necessary to decrease the demagnetizing field. Second, effects were investigated for three factors (i.e., MnSO4 concentration, bath pH, and NiSO4 concentration) causing the c-axis perpendicular orientation of the film properties. Optimum plating conditions for perpendicular recording media were thus determined.

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KW - ferromagnetism

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A Study on Electroless Plating of Cobalt Alloy Films for Perpendicular Recording

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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