Local structure and lattice covalency of complex perovskites BaM0.2Ta0.8O3−xNx (M = Li, Na, Mg) studied by X-ray diffraction and X-ray absorption spectroscopy

Local distortions of cubic perovskites BaM0.2Ta0.8O3−xNx (M = Li, Na, Mg) are disclosed by diffraction line broadening analysis and X-ray absorption spectroscopy.99