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HIGH COERCIVITY MAGHEMITE FILMS BY SPRAY-PYROLYSIS

被引：10
作者：
CHANG, WD
DENG, MC
TSAI, T
CHIN, TS
机构：
[1] Department of Materials Science and Engineering, Tsing Hua University, Hsinchu
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1992年 / 31卷 / 5A期
关键词：
MAGHEMITE FILM; COERCIVITY; SPRAY-PYROLYSIS; ANNEALING EFFECT; RECORDING MEDIA;
D O I：
10.1143/JJAP.31.1343
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Maghemite films with coercivity of 1200-1300 Oe, saturation magnetization of around 5000 G, and squareness ratio of 0.63-0.66 have been routinely prepared by spray-pyrolysis onto heated substrates of alumina, MgO(100) and Corning 7059 glass from aqueous nitrate solutions containing Fe, Co, and Mn. Composition and reduction-oxidation treatments were found to dominate coercivity. Glancing angle X-ray diffraction showed a single phase maghemite structure. Transmission electron microscope (TEM) studies on detached film material showed that ultrafine equiaxed particles of 40 to 90 nm contribute to high coercivity. Post-annealing was found to enhance coercivity substantially. These films are potential candidates for magnetic recording media.
引用
收藏
页码：1343 / 1346
页数：4
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