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Investigation of structural and magnetic properties of strained CoFe2O4 nanoparticles
Ojha, Vibha H. ; Kant, K. Mohan
The Journal of physics and chemistry of solids, 2021-01, Vol.148, p.109655, Article 109655
[Periódico revisado por pares]
Elsevier Ltd
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Título:
Investigation of structural and magnetic properties of strained CoFe2O4 nanoparticles
Autor:
Ojha, Vibha H.
;
Kant, K. Mohan
Assuntos:
Phonon confinement
;
Rietveld refinement
;
SPM Cobalt ferrite
;
Strain
;
Superparamagnetic moment
É parte de:
The Journal of physics and chemistry of solids, 2021-01, Vol.148, p.109655, Article 109655
Descrição:
Strained CoFe2O4 nanoparticles were prepared by co-precipitation route. Distributions of cations at tetrahedral and octahedral sites have been estimated from Rietveld refinement. The experimental data of strained CoFe2O4 nanoparticles exhibits asymmetric line shape in Raman spectra and observed to be sensitive to lattice strain. The lattice strain, crystallite size, lattice deformation stress and deformation energy density were estimated by Williamson- Hall- isotropic strain model (W–H-ISM) and Williamson- Hall-anisotropic strain model (W–H-ASM). Raman spectra revealed qualitative estimation of the strain to shift in frequency and correlated with the strain measured from X-ray diffraction. A relation is found between the saturation magnetization and superparamagnetic moments with strain at different temperature. It is observed that saturation magnetization values decrease with increasing strain values while reverse trend is observed for superparamagnetic moments. [Display omitted] •Qualitative estimation of strain shift in frequency is observed from Raman spectra.•Strain dependent magnetic properties were studied at different temperatures.•Dependence of saturation magnetization and superparamagnetic moments (μsp) on strain at different temperatures is studied.•Saturation magnetization decreases with increasing strain due to presence of non-magnetic layer at the surface results in increase in superparamgnetic moments (μsp) with increasing strain.
Editor:
Elsevier Ltd
Idioma:
Inglês
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