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Applicant:
Indian Institute of Technology (IIT) Patna 
Author:
Rajnish Kumar, Rakesh Kr. Singh, Mukesh Kumar Zope and M. Kar  
Corresponding Authors:
Manoranjan Kar 
DOI #:
https://doi.org/10.1016/j.mseb.2017.03.012 
Title:
Tuning of magnetic property by lattice strain in lead substituted cobalt ferrite 
Journal:
Materials Science and Engineering B  
Year:
2017 
Volume:
220 
Page:
73-81 
Keywords:
Spinel ferrite, Rietveld, Yafet-Kittel, Magnetocrystalline anisotropy 
Abstract:
Co1−xPbxFe2O4 (x = 00–0.15) have been synthesized using citric acid modified sol-gel method. Samples for x ≤ 0.02 have been ball milled to reduce the particle size. Hence, all the materials under the study are in almost equal crystallite size (∼15 nm). The phase purity and structural study have been carried out using X-ray powder diffraction (XRD) technique. The Rietveld refinement of XRD patterns reveals the increasing lattice parameter with the lead (Pb) concentration. Detailed analysis of the Raman spectroscopy data supports the XRD pattern analysis results. Magnetic hysteresis loop measurements have been performed using Vibrating Sample Magnetometer (VSM) at room temperature over field range of ±20 kOe. Magnetocrystalline anisotropy constant was calculated using Law of Approach (LA) to saturation, which shows increasing behavior till 2% Pb concentration. The large difference in experimental and theoretical saturation magnetic moment per formula unit shows existence of three sublattice model suggested by Yafet-Kittel. 
Entered by:
Physics Head on 2020-08-02 
 
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