Magnetic properties of Co-Fe electrodeposited alumite films

Author

Arai, K.I. ; Kang, H.W. ; Ishiyama, K.

Author_Institution

Res. Inst. of Electr. Commun., Tohoku Univ., Sendai, Japan

Volume

27

Issue

6

fYear

1991

fDate

11/1/1991 12:00:00 AM

Firstpage

4906

Lastpage

4908

Abstract

The magnetic properties of alumite film in which Co-Fe alloy is electrodeposited are investigated with regard to the alloy composition and the geometric structure of the magnetic films. The Co-Fe particles electro-deposited in the alumite film are single-phase alloy particles. The Co-Fe alloy electrodeposited films with small pore diameter (150 Å) have a large maximum magnetic energy product (BH_max) of about 1.44 MGOe due to the high coercive force, high saturation magnetization, and good squareness of the M-H curve. The magnetic properties of the Co-Fe electrodeposited alumite film of the composition of 34 at.% Co were as follows: H_c=2700 Oe and M_r/M_s=0.90. It is concluded that the Co-Fe alloy electrodeposited film shows good potential for perpendicular magnetic recording media of magnetic rotary encoders

Keywords

cobalt alloys; coercive force; electrodeposits; encoding; ferromagnetic properties of substances; iron alloys; magnetic anisotropy; magnetic hysteresis; magnetic recording; magnetic thin films; Co-Fe alloy; Co-Fe electrodeposited alumite films; CoFe-Al_xO_y; alloy composition; coercive force; geometric structure; hysteresis; large maximum magnetic energy product; magnetic anisotropy; magnetic films; magnetic properties; magnetic rotary encoders; perpendicular magnetic recording media; saturation magnetization; Aluminum; Coercive force; Extremities; Magnetic anisotropy; Magnetic films; Magnetic materials; Magnetic properties; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; Saturation magnetization;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.278694

Filename

278694