6533b856fe1ef96bd12b2ebe

RESEARCH PRODUCT

Study of Tetragonal Phase in 0.4Na1/2Bi1/2TiO3-(0.6-x)SrTiO3-xPbTiO3Solid Solutions by Second-Harmonic Generation

M. KundzinshM. DunceR. IgnatansEdgars NitissMaija AntonovaAndris SternbergEriks Birks

subject

Tetragonal crystal systemPhase transitionMaterials scienceCondensed matter physicsLocal symmetrySecond-harmonic generationCondensed Matter PhysicsSpectroscopyTernary operationFerroelectricityElectronic Optical and Magnetic MaterialsSolid solution

description

Description of the local symmetry of relaxor ferroelectrics, especially in connection with nature of polar nanoregions, is one of the key questions in research of relaxor ferroelectrics. Unlike such well-known relaxor ferroelectrics as PbMg1/3Nb2/3O3 and (Pb,La)(Zr0.65Ti0.35)O3, ternary solid solutions 0.4Na1/2Bi1/2TiO3-(0.6-x)SrTiO3-xPbTiO3 show clear coexistence of phases of tetragonal and cubic symmetry, which is established by x-ray diffractometry. Since the second-harmonic generation spectroscopy is a sensitive tool in determination of deviation from symmetry, containing a centre of inversion, it is used as an additional method in characterization of structure in 0.4Na1/2Bi1/2TiO3-(0.6-x)SrTiO3-xPbTiO3. Measurements indicate low, increasing intensity of the second-harmonic generation upon decreasing of temperature, for the samples with low concentration of PbTiO3. Whereas an abrupt change is observed at the phase transition between ferroelectric and relaxor states for the samples with higher concentr...

yearjournalcountryeditionlanguage
2015-08-26Ferroelectrics
https://doi.org/10.1080/00150193.2015.1060106