Magnetic study on Co3O4 nanoparticles

被引：98

作者：

Ichiyanagi, Y. ^{[1
]}

Kimishima, Y. ^{[1
]}

Yamada, S. ^{[1
]}

机构：

[1] Yokohama Natl Univ, Dept Phys, Yokohama, Kanagawa 2408501, Japan

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2004年 / 272卷

关键词：

nanoscopic systems; magnetization; co-oxide;

D O I：

10.1016/j.jmmm.2003.12.377

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetization measurements for the Co3O4 nanoparticles were performed. From the X-ray diffraction patterns Co3O4 nanoparticles surrounded by amorphous SiO2 were expected for the samples annealed between 623 and 873 K. Their diameters were estimated to be 2 or 3 nm. DC magnetization curves of zero-field cooled and field-cooled bifurcated around T-t = 10 K, while the bulk Co3O4 crystal exhibits antiferromagnetic transition temperature at T-N = 33 K. Characteristic properties of extremely small Co3O4 nanoparticles were confirmed. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：E1245 / E1246

页数：2

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