Soft magnetic properties and structure of high B/sub s/ Fe-Co-Al-O films

Author

Shintaku, K. ; Yamakawa, K. ; Ouchi, K.

Author_Institution

Akita Res. Inst. of Adv. Technol., Japan

fYear

2003

fDate

6-8 Jan. 2003

Firstpage

25

Abstract

Fe-Co based films have been investigated for writing head core materials with a high B/sub s/ in recent years. We have reported that the combination of a small amount of Al/sub 2/O/sub 3/ addition and a soft magnetic underlayer film is important to obtain small H/sub ch/ with high B/sub s/ of 2.4 T in a wide range of film thickness for Fe-Co films. The mechanism of soft magnetic properties by using the Al/sub 2/O/sub 3/ addition and/or the soft magnetic underlayer film is studied. We confirm that the soft magnetic properties of Fe-Co system films are related to the expansion of the lattice constant and random crystal orientation.

Keywords

alloying additions; alumina; cobalt alloys; crystal orientation; iron alloys; lattice constants; magnetic recording; magnetic thin films; soft magnetic materials; (Fe/sub 70/Co/sub 30/)/sub 100/Al/sub 2/O/sub 3/; 2.4 T; Al/sub 2/O/sub 3/ addition; Fe-Co-Al-O films; film thickness; lattice constant expansion; random crystal orientation; soft magnetic properties; structure; writing head core materials; Grain size; Lattices; Magnetic films; Magnetic heads; Magnetic properties; Semiconductor films; Soft magnetic materials; Substrates; Writing; X-ray scattering;

fLanguage

English

Publisher

ieee

Conference_Titel

Joint NAPMRC 2003. Digest of Technical Papers [Perpendicular Magnetic Recording Conference]

Conference_Location

Monterey, CA, USA

Print_ISBN

0-7803-7746-X

Type

conf

DOI

10.1109/NAPMRC.2003.1177029

Filename

1177029