Influence of trivalent Al–Cr co-substitution on the structural, morphological and Mössbauer properties of nickel ferrite nanoparticles

摘要: Abstract Here, we report the influence of nonmagnetic Al3+ and magnetic Cr3+ co-substitution on structural, morphological, Mossbauer properties nickel ferrite nanoparticles synthesized via sol-gel auto combustion route. Citric acid was used as a fuel metal nitrate to ratio chosen be 1:3. The resultant powder sintered at 550 °C for 4 h further characterizations. Single phase formation nanocrystalline nature confirmed through X-ray diffraction analysis. crystallite size all samples calculated Debye-Scherrer’s formula found in range 18–55 nm. lattice constant from XRD data show decreasing trend. Scanning electron microscopy technique study surface morphology typical (x = 0.0 0.4). average grain determined SEM images 70 nm–35 nm respectively x = 0.0 0.4 samples. were investigated magnetization spectroscopy technique. saturation measured M-H hysteresis plot trend with increase Al–Cr content x. Using spectra relative area sextet (T), Isomer shift (δ), Hyperfine Field (Hf), Quadrupole Splitting (Δ) Line width (Γ) calculated. Overall, has significantly influenced morphological nanoparticles.