Abstract
Polycrystalline ceramic powders of copper doped manganese ferrite (Mn1−xCuxFe2O4, x = 0.25, 0.50 and 0.75) synthesized by ceramic technique have been subjected to high-energy ball-milling to study the influence of mechanical milling on structural and magnetic properties through X-ray diffraction, scanning electron microscopy, fourier transform infrared spectroscopy and magnetization measurements. The compositional stoichiometry has been ascertained by energy dispersive analysis of X-rays mapping before commencement of high-energy ball milling of the powders. The X-ray diffraction patterns of all as prepared specimens show cubic (fcc) spinel structure with no traces of any impurity of ingredients or unexpected structural phase. The Jahn–Teller (JT) structural distortion evolves after 30 h of prolonged ball milling in all the samples, in fact the tetragonal distortion of the unit cell appears in the sample with x = 0.75 just after 18 h of milling duration. The saturation magnetization at 77 K temperature in the peak field of 5 kOe has been measured for each specimen and the Curie temperatures have been determined through thermal variation of low field (0.5 Oe) AC susceptibility. Infrared spectra also reflect the JT distortion of the unit cell due to ball milling.
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Tanna, A.R., Joshi, H.H. Influence of mechanical milling on structural and magnetic properties of Cu2+ substituted MnFe2O4 . Indian J Phys 90, 981–989 (2016). https://doi.org/10.1007/s12648-015-0825-2
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DOI: https://doi.org/10.1007/s12648-015-0825-2