Size effect on the magnetic property of CoAl2O4 nanopowders prepared by reverse micelle processing
作者： J. Chandradass , M. Balasubramanian , Ki Hyeon Kim
DOI: 10.1016/J.JALLCOM.2010.07.014
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摘要: Abstract Cobalt aluminate (CoAl2O4) nanopowders were synthesized by reverse microemulsion process using cyclohexane, a nonionic surfactant, and aqueous solutions of cobalt (II) nitrate hexahydrate aluminum nonahydrate. The influence water to surfactant molar ratio on the size powders has been studied. X-ray diffraction analysis shows that calcined at 1000 °C have single phase cubic spinel structure. average particles increases with increasing ratio. mean diameter varies between 42 57 nm. Fourier transform infrared spectra also confirm formation CoAl2O4. Magnetization study reveals CoAl2O4 sample exhibits superparamagnetic behavior.
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