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

Title
Size effect on the magnetic property of CoAl2O4 nanopowders prepared by reverse micelle processing
Author(s)
김기현제야슬란챤드라다스M. Balasubramanian[M. Balasubramanian]
Keywords
HETEROBIMETALLIC ALKOXIDE PRECURSORS; SOL-GEL; ALUMINUM SPINELS; ZINC FERRITE; NANOPARTICLES; PARTICLES; POWDERS
Issue Date
201009
Publisher
ELSEVIER SCIENCE SA
Citation
JOURNAL OF ALLOYS AND COMPOUNDS, v.506, no.1, pp.395 - 399
Abstract
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.
URI
http://hdl.handle.net/YU.REPOSITORY/23656http://dx.doi.org/10.1016/j.jallcom.2010.07.014
ISSN
0925-8388
Appears in Collections:
이과대학 > 물리학과 > Articles
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