Formation mechanism of nano-crystalline β-Fe2O3 particles with bixbyite structure and their magnetic properties

被引：22

作者：

Danno, T. ^{[1
]}

Asaoka, H. ^{[1
]}

Nakanishi, M. ^{[1
]}

Fujii, T. ^{[1
]}

Ikeda, Y.

Kusano, Y.

Takada, J. ^{[1
]}

机构：

[1] Okayama Univ, Grad Sch Nat Sci & Technol, Dept Chem Mat, Okayama 7008530, Japan

来源：

INTERNATIONAL CONFERENCE ON MAGNETISM (ICM 2009) | 2010年 / 200卷

关键词：

FILMS;

D O I：

10.1088/1742-6596/200/8/082003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Formation mechanism of nano-crystalline beta-Fe2O3 particles was investigated by controlling the preparation conditions such as the mixing ratio of NaFe(SO4)(2) to NaCl and heating treatment temperature. A single phase of beta-Fe2O3 was formed regardless of the mixing ratio. The heat treatment temperature strongly affected the particle shapes and sizes. Below 490 degrees C, they had granular shape with a diameter of about 50 to 100 nm. While, above 490 degrees C, cubic particles with increased size of about 1 mu m were produced. All samples were antiferromagnetic at low temperature. The Neel temperature (T-N) of 119 K for the large cubic particles was decreased to 113 K for the nanoparticles.

引用

页数：4

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