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Structural and magnetic characterizations of MnNiZn ferrite nanoparticles
Author(s) -
Mane Dhanraj R.,
Birajdar Damodar D.,
Shirsath Sagar E.,
Telugu Raghavender A.,
Kadam Ram. H.
Publication year - 2010
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201026079
Subject(s) - ionic radius , spinel , lattice constant , materials science , ferrite (magnet) , analytical chemistry (journal) , crystal structure , diffraction , ion , magnetization , metal , crystallography , chemistry , metallurgy , magnetic field , physics , organic chemistry , chromatography , quantum mechanics , optics , composite material
The ferrite samples of Ni 0.7− x Mn x Zn 0.3 Fe 2 O 4 (where x = 0.0–0.7 in steps of x = 0.1) were synthesized by a sol–gel autocombustion method using nitrates of respective metal ions. The synthesized samples were annealed at 600 °C for 4 h. The phase purity of the samples was investigated by X‐ray diffraction (XRD). An analysis of XRD patterns reveals the formation of single‐phase cubic spinel structure. The crystal lattice constant increases gradually with increasing x from 8.389 to 8.473 Å. The cation distribution of constituent ions shows linear dependence of Mn substitution. Based on the cation distribution obtained from XRD data, structural parameters such as lattice parameters, ionic radii of available sites, and the oxygen parameter “ u ” have been calculated. The trend of theoretically calculated lattice parameter with Mn content matches well with the experimentally obtained values. An initial increase followed by a subsequent decrease of saturation magnetization with increase in x is observed. Possible explanations for the observed structural and magnetic behavior with various Mn content are discussed.