Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403


공학

한국표면공학회지 (23권3호 150-159)

Magnetic Properties of Electrodeposited Iron and Cobalt on Porous Aluminum Oxide Layer

다공성 알루미늄 양극산화 피막에 도금된 철 및 코박트의 자기적 성질

김기호;강탁;손헌준;
Kim, K. H.;Kang, T.;Sohn, H. J.;

서울대학교 공과대학 금속공학과;서울대학교 공과대학 자원공학과;
서울대학교 공과대학 금속공학과;서울대학교 공과대학 자원공학과;

Abstract

The magnetic properties of electrodeposited iron and cobalt films on porous aluminum oxide film were examined. There exists perpendicular magnetic anisotropy due to the shape anisotropy. The coercivity and squareness ratio of films were strongly dependent on deposited particle diameter. The effect of packing fraction on squareness ratio was also apprecible. Unlike the iron-deposited films, the magnetic properties of cobalt films were changed by preferred orientation because of it`s large crystal ansotropy constant.(about 10 times of Fe) The Fe deposited films were found to be more suitable for perpendicular magenetic recording media bacause perpendicular coercivity, squareness ratio and the ratio of perpendicular coercivity to horizontal ones of iron films are greater than those of cobalt films.

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