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Microstructural, magnetic, and hyperfine characterizations of Cu‐doped cobalt ferrite nanoparticles
Author(s) -
Ghosh Mritunjoy Prasad,
Mukherjee Samrat
Publication year - 2019
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.16687
Subject(s) - ferrimagnetism , coprecipitation , crystallite , materials science , curie temperature , analytical chemistry (journal) , cobalt , ferrite (magnet) , mössbauer spectroscopy , doping , hyperfine structure , nanoparticle , superparamagnetism , crystallography , magnetization , ferromagnetism , chemistry , metallurgy , inorganic chemistry , nanotechnology , magnetic field , condensed matter physics , composite material , physics , optoelectronics , chromatography , quantum mechanics
We have investigated the structural and magnetic properties of polycrystalline Cu‐substituted cobalt ferrite (Cu x Co 1− x Fe 2 O 4 : x = 0.00, 0.15, 0.30, 0.45, 0.60) nanoparticles, synthesized via chemical coprecipitation method. The prepared samples were of single phase as confirmed by X‐ray diffraction analysis. The mean crystallite size ranged from 44 to 65 nm was obtained using Scherrer's formula. M‐T curves revealed that the Curie temperature of all the samples was above room temperature and it was found to decrease with increasing Cu concentration, which was supported by Mössbauer spectra. Field cooled (FC) hysteresis curves showed ferrimagnetic nature at 5 K and room temperature. It was observed that careful variation of Cu concentration in cobalt ferrite lead to weak A‐B interaction with tunable magnetic properties.