Microstructural study of electroless-plated CoNiP ternary alloy films for perpendicular magnetic recording media

Author

Homma, Takayuki ; Inoue, Katsumi ; Asai, Hiroki ; Ohrui, Ken ; Osaka, Tetsuya

Author_Institution

Dept. of Appl. Chem., Waseda Univ., Tokyo, Japan

Volume

27

Issue

6

fYear

1991

fDate

11/1/1991 12:00:00 AM

Firstpage

4909

Lastpage

4911

Abstract

The microstructure of electroless CoNiP films with various H _c(⊥) values for use as perpendicular magnetic recording media was investigated. It was observed that the H _c(⊥) values of the films varied according to their microstructure. The film which showed the highest H_c(⊥) value contained large columnar grains with high crystallinity, whereas such a clear columnar structure was not observed in the films with lower H_c(⊥) values. The shape anisotropy due to the columnar structure effectively contributes to the magnetic properties of the films as well as magnetocrystalline anisotropy associated with preferred crystallographic orientation. The results of compositional analysis of ultra-small regions suggested that the formation of low M_s and low H_c regions at the initial deposition stage was due to a preferential deposition of Ni

Keywords

cobalt alloys; coercive force; crystal microstructure; electroless deposited coatings; ferromagnetic properties of substances; magnetic anisotropy; magnetic recording; magnetic thin films; nickel alloys; phosphorus alloys; transmission electron microscope examination of materials; TEM images; compositional analysis; electroless CoNiP films; large columnar grains; magnetic properties; magnetocrystalline anisotropy; microstructure; perpendicular magnetic recording media; preferred crystallographic orientation; shape anisotropy; ultra-small regions; Anisotropic magnetoresistance; Crystal microstructure; Crystallization; Crystallography; Magnetic anisotropy; Magnetic films; Magnetic properties; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; Shape;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.278695

Filename

278695