Size effect on the magnetic property of CoAl2O4 nanopowders prepared by reverse micelle processing

被引：67

作者：

Chandradass, J. ^{[1
]}

Balasubramanian, M. ^{[2
]}

Kim, Ki Hyeon ^{[1
]}

机构：

[1] Yeungnam Univ, Dept Phys, Kyongsan 712749, Gyeongsangbuk D, South Korea

[2] Indian Inst Technol Madras, Dept Met & Mat Engn, Madras 600036, Tamil Nadu, India

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 506卷 / 01期

关键词：

Ceramics; Chemical synthesis; Characterization; Nanomaterials; Magnetic property; SOL-GEL; ALUMINUM SPINELS; ZINC FERRITE; NANOPARTICLES; POWDERS;

D O I：

10.1016/j.jallcom.2010.07.014

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：

Cobalt aluminate (CoAl2O4) nanopowders were synthesized by reverse microemulsion process using cyclohexane, a nonionic surfactant, and aqueous solutions of cobalt (II) nitrate hexahydrate and aluminum nitrate nonahydrate. The influence of water to surfactant molar ratio on the size of powders has been studied. The X-ray diffraction analysis shows that the powders calcined at 1000 degrees C have single phase cubic spinel structure. The average size of the particles increases with increasing water to surfactant molar ratio. The mean diameter of the particles varies between 42 and 57 nm. The Fourier transform infrared spectra also confirm the formation of CoAl2O4. Magnetization study reveals that the CoAl2O4 sample exhibits superparamagnetic behavior. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：395 / 399

页数：5

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