High coercivity Sr-ferrite magnetic thin films induced by various underlayers

Citation
Wc. Chang et al., High coercivity Sr-ferrite magnetic thin films induced by various underlayers, J MAT SCI T, 16(2), 2000, pp. 201-203
Citations number
7
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Material Science & Engineering
Journal title
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN journal
1005-0302 → ACNP
Volume
16
Issue
2
Year of publication
2000
Pages
201 - 203
Database
ISI
SICI code
1005-0302(200003)16:2<201:HCSMTF>2.0.ZU;2-K
Abstract
Three kinds of oxide underlayers, namely SiO2, ZnO and Al2O3, were deposite d prior to the sputtering of Sr-ferrite films, respectively, in order to in duce the optimum grain morphology and the texture of the films. A Sr-ferrit e film with an easy axis in-plane orientation was induced by SiO2 underlaye r. In contrast, it prefers to be perpendicular to film plane for the cases of ZnO and Al2O3 underlayers. The optimum magnetic properties of the former film along film plane are: 4 pi M-r=1.7 kG, H-i(c)=5.35 kOe, and S-q=0.59, which are mainly dominated by the exchange coupling effect. determined by Wohlfarth's remanence analysis. among grains. White those for the films wit h an easy axis perpendicular to film plane can be as high as 4 pi M-r=3.72 kG, H-i(c)=6.42 kOe, and S-q=0.82, which are mainly dominated by the magnet ostatic interaction among grains.