No abstract

Zn1-xSrxAl2O4 (0 ≤ x ≤ 0.5) nanoparticles are successfully produced by combustion method. Powder XRD studies confirms the substitution of Sr2+ in ZnAl2O4 spinel nanostructure and average crystallite size lies between 32 to 39 nm. FTIR spectra revealed bands at 710 and 563 cm-1 corresponds to the intrinsic stretching vibrations of Mtetra–O atom which takes place at tetrahedral lattice sites and octahedral metal stretching Moctra–O appears as peak positioned at 498 cm-1 . HR-SEM images confirms spherical nanoparticles with agglomerated nature for strontium doped zinc aluminate nanoparticles. The presence of oxygen, aluminium, zinc and magnesium elements were confirmed from EDX spectra. The band gap of ZnAl2O4 was found to be 5.16 eV and the bandgap increases gradually with the increase in Sr2+ doping concentration. The magnetization plots were determined the super paramagnetic behaviour at room temperature.