Preparation and magnetic properties of CoCrFeO4 nanocrystals

被引：28

作者：

Xiong, G

Mai, ZH

Xu, M

Cui, SF

Ni, YM

Zhao, ZX

Wang, X

Lu, LD

机构：

[1] Chinese Acad Sci, Inst Phys, Natl Lab Superconduct, Beijing 100080, Peoples R China

[2] Chinese Acad Sci, Ctr Condensed Matter, Beijing 100080, Peoples R China

[3] Nanjing Univ Sci & Technol, Mat Chem Lab, Nanjing 210094, Peoples R China

来源：

CHEMISTRY OF MATERIALS | 2001年 / 13卷 / 06期

关键词：

D O I：

10.1021/cm000854i

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

CoCrFeO4 nanocrystals were synthesized using a sol-gel method. The specimen had an average grain size of 8.1 nm. The zero-field-cooled and field-cooled curves showed a superparamagnetic transition occurring at a blocking temperature of TB ≈ 249 K. The temperature dependence of the saturation magnetization showed that Bloch's the law holds but with a Bloch exponent lower than the bulk value. These results imply that the magnetic behavior of nanoparticles is richly dependent on the surface and the interface.

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页码：1943 / 1945

页数：3

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