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Magnetic domain behavior of Cu-Co spinel ferrite system

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2 Author(s)
S. I. Patil ; Dept. of Phys., Poona Univ., Pune, India ; R. V. Dabhade

Ferrimagnetic oxides may contain single domain or multidomain particles and they convert into superparamagnetic state near the Curie temperature. To explore the existence of these particles Cu-Co mixed spinel ferrites were prepared by standard ceramic technique. The structural aspects of samples were characterised by X-ray diffraction and magnetic measurement. All the studied compounds were crystalline and single phase. The hysteresis parameters were found by vibrating sample magnetometer. The low field a.c. susceptibility measurements were carried out from 300 K to Curie temperature, and the normalized susceptibility was plotted as a function of temperature. The variation in susceptibility was attributed to the transition from single or multidomain to superparamagnetic particle state. The observed results are explained on the basis of magnetic particles, grain size and magnetic anisotropy of the system

Published in:

IEEE Transactions on Magnetics  (Volume:30 ,  Issue: 6 )