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Static magnetic properties and cation distribution in partially inverse polycrystalline Ni–Co ferrites
- Source :
- Applied Physics A. 124
- Publication Year :
- 2018
- Publisher :
- Springer Science and Business Media LLC, 2018.
-
Abstract
- Polycrystalline samples of Ni1 − xCoxFe2O4 (where x = 0.0, 0.4, 0.5, 0.6, 1.0) have been synthesized by solid state sintering of stoichiometric nanoparticles prepared by sol–gel technique. Rietveld refined powder X-ray diffraction patterns confirm the formation of a single cubic spinel phase in each sample. Substitution of cobalt ions results in the increase of the lattice parameter. The saturation magnetization and coercivity of all the samples were measured using PPMS-VSM and found to increase from 51.6 to 82.2 emu/g, and 9.7 to 588 Oe, respectively. The observed magnetic ordering is explained on the bases of two sublattice model and redistribution of cations in these partially inverse Co substituted Ni ferrite samples. The strong increment (60 times) in the coercivity is explained on the bases of microstructure and magnetocrystalline anisotropy. Cation redistribution in these samples is proposed on the basis of the observed magnetic moment. Close matching of lattice parameter calculated from the magnetic data and estimated from the X-ray diffraction data supports the proposed cation redistribution in the partially inverse spinel phase of NCFO.
- Subjects :
- Materials science
Magnetic moment
Spinel
Analytical chemistry
02 engineering and technology
General Chemistry
Coercivity
engineering.material
010402 general chemistry
021001 nanoscience & nanotechnology
Magnetocrystalline anisotropy
01 natural sciences
0104 chemical sciences
Lattice constant
Phase (matter)
engineering
Ferrite (magnet)
General Materials Science
Crystallite
0210 nano-technology
Subjects
Details
- ISSN :
- 14320630 and 09478396
- Volume :
- 124
- Database :
- OpenAIRE
- Journal :
- Applied Physics A
- Accession number :
- edsair.doi...........c158f89dbbf7d4807cb15938f5375384