Ferroelectrics · 1996 · 12 citations · 4 references
Natural SciencesMaterials SciencePhysicsCondensed Matter PhysicsCrystal StructureSolid State PhysicsCrystal ChemistryCrystal LatticeCrystalline MaterialsFerroelectric MaterialsFerroelectric CrystalsFerroelectric PropertiesFerroelectricityHarmonic GenerationPolarizationSecond Harmonic Generation SpectroscopySecond-harmonic GenerationSpontaneous Polarization
Abstract Roman scattering and second harmonic generation in the LiTaxNb1−xO3 solid solutions have been studied. The structure disordering with increasing x was shown to occur first in the cation sublattice due to violation of cation ordering along the polar axis. Further increase of x leads to growth of this disordering and to deformation of the oxygen structure of the crystal. Behaviour of spectral parameters for some lines and of spontaneous polarization indicates the existence of specific concentrations points at x ∼ 0.4 and x ∼ 0.6 with maximal deformation of the crystalline unit cell. Key Words: Ferroelectric crystalsolid solutionRaman spectroscopysecond harmonic generation
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Ferroelectrics and Antiferroelectrics
G. A. Smolenskiy · Defense Technical Information Center (DTIC) · 1972 · 208 citations
Light scattering by lithium tantalate at room temperature
A. F. S. Penna, Anderson S. Chaves, P. da R. Andrade et al. · Physical review. B, Solid state · 1976 · 102 citations · Full text