Author(s): K. Rajasekhar Babu, M. Purnachandra Rao, P. S. V. Subba Rao, K. Rama Rao
Published in: International Journal of Engineering Research & Technology
License: This work is licensed under a Creative Commons Attribution 4.0 International License.
Volume/Issue: Volume. 6 - Issue. 01 , January - 2017
In this work, influence of Cu substitution on structural and magnetic properties of Cobalt-Zinc ferrite nanoparticles synthesized by sol-gel combustion method have been investigated. All the samples exhibit cubic spinel structure and the lattice constant decreases linearly with increasing Cu-content. Average crystallite sizes calculated from Debye-Scherrer formula are in the range of 51-100nm. Cation distribution estimated form X-ray line intensity calculations show that Cu ions simultaneously occupy tetrahedral (A) and octahedral (B) sites with different ratio and Zn and Co ions occupies A and B sites respectively. With increasing Cu content a fraction of Co ions migrate to A site when x>0.2. Saturation magnetization (Ms), Coercivity (Hc) and remanent magnetization (Mr) that varies significantly with Cu-Content. Saturation magnetization decreases from 90.7 emu/g (x=0.0) to 51 emu/g (x=0.4). The proposed cation distribution supports the variation in saturation magnetization and Coercivity with increasing Cu content.
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