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Sharifi, I., Shokrollahi, H.. (1391). Magnetic and Structural Investigations of Nanocrystalline Cobalt-Ferrite. , 45(1), 35-40. doi: 10.7508/jufgnsm.2012.01.007
I. Sharifi; H. Shokrollahi. "Magnetic and Structural Investigations of Nanocrystalline Cobalt-Ferrite". , 45, 1, 1391, 35-40. doi: 10.7508/jufgnsm.2012.01.007
Sharifi, I., Shokrollahi, H.. (1391). 'Magnetic and Structural Investigations of Nanocrystalline Cobalt-Ferrite', , 45(1), pp. 35-40. doi: 10.7508/jufgnsm.2012.01.007
Sharifi, I., Shokrollahi, H.. Magnetic and Structural Investigations of Nanocrystalline Cobalt-Ferrite. , 1391; 45(1): 35-40. doi: 10.7508/jufgnsm.2012.01.007

Magnetic and Structural Investigations of Nanocrystalline Cobalt-Ferrite

Journal of Ultrafine Grained and Nanostructured Materials
مقاله 7، دوره 45، شماره 1، دی 2012، صفحه 35-40    اصل مقاله (263.26 K)
شناسه دیجیتال (DOI): 10.7508/jufgnsm.2012.01.007
نویسندگان
I. Sharifi1؛ H. Shokrollahi2
1Electroceramics Group, Materials Science and Engineering Department, Shiraz University of Technology
2Electroceramics Group, Materials Science and Engineering Department, Shiraz University of Technolog
چکیده
Cobalt ferrite is an important magnetic material due to their large magneto-crystalline anisotropy, high
cohercivity, moderate saturation magnetization and chemical stability.In this study, cobalt ferrites
Nanoparticles have been synthesized by the co-precipitation method and a new microemulsion route. We
examined the cation occupancy in the spinel structure based on the “Rietveld with energies” method. The Xray
measurements revealed the production of a broad single ferrite cubic phase with the average particle
sizes of about 12 nm and 7nm, for co-precipitation and micro-emulsion methods, respectively. The FTIR
measurements between 400 and 4000 cm-1 confirmed the intrinsic cation vibrations of the spinelstructure for
the two methods. Furthermore, the Vibrating Sample Magnetometer (VSM) was carried out at room
temperature to study the structural and magnetic properties. The results revealed that by changing the method
from co-precipitation to the reverse micelle the material exhibits a softer magnetic behavior in such a way
that both saturation magnetization and coercivity decrease from 58 to 29 emu/g and from 286 to 25 Oe,
respectively.
کلیدواژه‌ها
Cobalt ferrite؛ co-precipitation؛ Magnetic nanoparticles؛ micro-emulsion
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