Effect of Cu-substitution on structural, magnetic, and nonlinear optical properties of ZnAl spinel ferrite nanoparticles
摘要
Cu-substituted Zn–Al spinel ferrites nanoparticles of chemical formula (CuₓZn₁₋ₓ)(AlₓFe₂₋ₓ)O₄ (x = 0.15) have been prepared using the conventional solid state reaction method for the study of structural and nonlinear optical property variations due to compositional variations. The X-ray diffraction pattern suggests the formation of cubic phase spinel ferrite nanoparticles with a lattice constant value of 8.39 Å. The FTIR spectroscopy analysis suggests the vibrational modes corresponding to metal-oxygen bonding, showing that there is cationic redistribution within tetrahedral and octahedral sites. The TEM and SAED images suggest the presence of a nanocrystalline nature of spinel ferrite nanoparticles. The EPR spectral analysis performed in the temperature range of 95–300 K shows a predominantly paramagnetic behavior.