X-ray, optical and dielectric studies of diffused phase transitions in NaNbO3-based solid solution crystals
FERROELECTRICS 298 (2004) 261-265
Abstract:
In flux-grown (1-x)NaNbO3 -(x)Gd1/3NbO3 solid solution crystals a diffusion of the dielectric permittivity epsilon maximum grows with x and increases dramatically when x exceeds a threshold value x 0 approximate to 0.1. Optical studies by the rotating-polarizer method show that Gd-doping results in a very small mean size of twins and the distribution of the birefringence image becomes very messy. In the x < x(0) range the changes of lattice parameters and birefringence corresponding to the epsilon(T) anomaly were revealed. The results obtained are in line with the assumption that phase transition diffusion in NaNbO3 is a result of the local strains stemmed from the impurities.High-pressure x-ray scattering of oxides with a nanoscale local structure: Application toNa 1 / 2 Bi 1 / 2 TiO 3
Physical Review B American Physical Society (APS) 68:1 (2003) 014113
High-pressure x-ray scattering of oxides with a nanoscale local structure: Application to Na1/2Bi1/2TiO3 - art. no. 014113
PHYSICAL REVIEW B 68:1 (2003) ARTN 014113
Optical birefringence imaging of the phase transition of K2Mn2(SO4)3
JOURNAL OF APPLIED CRYSTALLOGRAPHY 36:2 (2003) 914-919
Investigation of the structure and phases in perovskite-type lead magnesium niobate titanate (PMN-PT)
Acta Crystallographica Section A: Foundations and advances International Union of Crystallography (IUCr) 58:s1 (2002) c341-c341