LAUSR

Abstract 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.