Open AccessSTUDY ON THE COERCIVITY OF RF SPUTTERED IRON OXIDE THIN FILMS
Author(s) -
Yu Mei,
You Guang-Jian,
Zhou Zeng-Jun,
Luo Hui-Lin
Publication year - 1987
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.36.562
Subject(s) - coercivity , magnetocrystalline anisotropy , materials science , anisotropy , condensed matter physics , magnetic anisotropy , oxide , thin film , nuclear magnetic resonance , iron oxide , metallurgy , magnetization , nanotechnology , magnetic field , optics , physics , quantum mechanics
The study on magnetic properties of RF sputtered iron oxide thin films was carried out systematically. More specifically, the temperature dependence (77-500 K) of the coercivity and the variation of coercivity with different iron oxide phases such as the as-sputtered Fe3O4, partially transformed Fe3O4/(γ-Fe2O3), and γ-Fe2O3, were investigated. Comparing the theoretical analyses with the experimental results, the contributions to the coercivity from shape anisotropy, magnetocrystalline anisotropy, and stress-induced magnetic anisotropy were obtained separately. And the first-order crystalline anisotropy constant K1 vs. temperature for Fe3O4 and γ-Fe2O3 films was derived from Ms(T) and Hc(T) over the temperature range of 100-500 K.