발간논문

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Vol.30, No.4, 377 ~ 382, 1992
Title
Synthesis and Magnetic Properties of Cobalt Ferrite Epitaxial γ - Fe2O3
변태봉T . B . Byeon, 이재영J . Y . Lee, 김대영D . Y . Kim, 손진군J . G . Shon
Abstract
Acicular γ-Fe₂O₃ particles were heated at 90℃ in alkaline solution containing Co^(+2) and Fe^(+2). The coercivity of resultant product increased from 0.2 to 0.25, Co^(+2)/Fe^(+2) molar ratio, and gradually decreased above 0.25. When cobalt content is increased, the coercivity of resultant product increased linearly. The increase of coercivity was attributed to the crystalline magnetic anisotropy of the cobalt ferrite which is conform to coating layer. The coercivity increased with the increasing seed content. The stability of temperature and the change on standing was largely influenced by the composition of coating layer and showed the most superior properties in the range of the Co^(+2)/Fe^(+2) molar ratio of 0.36∼0.5.
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