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Particle Size Dependent Structural and Magnetic Properties of CoCrFeO4 Nanoparticles

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Abstract:

Nanoparticles of CoCrFeO4 ferrite in the particle size range of 9 - 38 nm have been prepared by a sol-gel auto combustion method. Synthesized powders were annealed at four different temperatures viz. 400 °C, 600 °C, 800 °C and 1000 °C. Particle sizes are determined by X-ray analysis and TEM. The size of the nanoparticles increase linearly with sintering temperature and time, most probably due to coalescence that increases as sintering temperature increases. The saturation magnetization increases from 62 to 81 emu/g and coercivity initially increases up to 814 Oe and then decreases to 366 Oe with increase in particle size and sintering temperature. The typical blocking temperature increases from 135 to 165 K with increasing particle size.

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Periodical:

Advanced Materials Research (Volume 486)

Pages:

129-133

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.486.129

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Online since:

March 2012

Authors:

R. Mane Dhanraj, H. Kadam Ram, T. Alone Suresh, E. Shirsath Sagar

Keywords:

Blocking Temperature, Ferrite, Magnetic Property, Sintering Temperature

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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