Magnetic properties of Co and 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

26

Issue

5

fYear

1990

fDate

9/1/1990 12:00:00 AM

Firstpage

1635

Lastpage

1637

Abstract

Co and Co-Fe were electrodeposited in pores of anodic oxidized alumite films. It is shown that the magnetic anisotropy energy and the perpendicular coercive force of Co electrodeposited alumite films can be controlled widely by changing the pH and the temperature of the Co solutions without changing the particle diameter. It is shown that, by properly selecting the composition of the electrodeposited alloys, the saturation magnetization and the coercive force of the magnetic alumite films can be controlled. At a composition of 50 at.% Co-Fe, the perpendicular coercive H_c(⊥) reaches a maximum value of 2700 Oe and the saturation magnetization is as high as 382 emu/cm³ for the packing density P=0.2. Therefore, with this composition, the magnetic alumite film can be used for recording media

Keywords

cobalt; cobalt alloys; coercive force; electrodeposits; ferromagnetic properties of substances; iron alloys; magnetic anisotropy; magnetic recording; magnetic thin films; magnetisation; Co; Co-Fe; anodic oxidized alumite films; electrodeposited alumite films; magnetic anisotropy energy; packing density; perpendicular coercive force; recording media; saturation magnetization; Coercive force; Force control; Magnetic anisotropy; Magnetic films; Magnetic properties; Magnetic recording; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; Saturation magnetization; Temperature control;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.104472

Filename

104472