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X-ray diffraction is described by the Rietveld method in Na1/2Bi1/2TiO3-based solid solutions. Stability of ferroelectric state and coexistence of phases with different symmetry is determined in the region of structural phase transition.

Nature of electrocaloric effect is studied in connection with various mechanisms of polarization in relaxor ferroelectrics.

Phase diagram and nature of phase transition are determined for Na1/2Bi1/2TiO3-BaTiO3-Na1-xKxNbO3 solid solutions.

Optical second harmonic generation is used as sensitive probe identifying polar state in NBT based solid solutions below morphotropic phase boundary.

Intensity and spectral features of photoluminescence in lanthanides doped ABO3 perovskites is studied in dependence on host symmetry and structural disorder.

ABO3 perovskites are doped with 3d elements (Cr, Mn, Fe, Co, Ni, Cu) to study their influence on stability of ferroelectric state and dielectric properties.