Correlation between Rietveld refinement yielded spontaneous polarization and experimentally obtained polarization data for Bi₂Mo_1-xW_xO₆ nanomaterials

Single phase perovskite Bismuth Molybadate, Bi₂Mo_1-xW_xO₆ [x=0.00, 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.08 and 0.10] compositions were prepared using microwave sintering in air for 5hours. The prepared compacted ceramics were characterized by X-ray diffraction (XRD) at room temperature and obtained XRD data was fitted for Rietveld refinement. The analysis of results confirmed the formation of the orthorhombic crystal structure with the space group of pca21. The atomic displacements for various sites a, b, c yielded close spontaneous polarization and indicated about schematic tilting of octahedrons atmospheric carbon adsorption as contamination on nano open surfaces. Reduced direction cosines indicated about increased strength of MoO₆ octahedrons against IR absorptions as shown by FTIR analysis, due to large oxygen bond strength of tungsten W than molybdenum Mo in BMO materials. Contaminated carbon groups were confirmed via additionally appearing FTIR peaks