Effect of chromium at B site substitution on CaTiO₃ perovskite ceramics for data storage application

Pure and transition metal doped calcium titanate (CaTi_1 − xM_xO₃ where M = Cr) was prepared by solid state reaction technique to study effect of doping on the structural, optical and electrical properties of calcium titanate. Structural properties were investigated by XRD. Also XRD pattern revealed the orthorhombic phase with Pbnm space group which was confirmed by calculating different parameters. SEM results showed the variation of grain size distribution ranging from 470 to 371 nm. FTIR studies confirmed the presence of the functional group modes of vibrations. Optical properties were studied by UV and FL techniques. Furthermore, from optical analysis shows that energy gap of the pure sample increased from 1.8 to 2.9 eV respectively. VSM revealed the presence of magnetic property in the sample and with substitution the magnetic behaviour first decreased for x = 0.2 then enhanced for x = 0.4 and VSM analyze that our material is a ferromagnetic in nature.