Investigation of phase segregation using Rietveld refinement in Mg doped BaTiO3 solid solutions and their ferroelectric properties

Ba(1-x) Mgx Ti O3 (BMT) samples were synthesised using solid state reaction route with ‘x’ varying from 0.025 to 0.10. The structural and ferroelectric properties of the bulk samples were investigated. The XRD analysis shows the presence of two phases, the first phase being magnesium doped BT (space group P4mm) and the second phase being Ba2TiO4 (space group Pna21). The tetragonal phase was found to be the major phase in the samples. The double phase Rietveld refinement was done and the weight percentage of orthorhombic phase was found to vary from 3.43% to 6.96% for x varying from 0.025≤x≤0.10. The P – E measurements reveal that all the samples exhibit lossy behaviour.