Publication | Open Access
Spontaneous birefringence of flux grown single crystals of the ferroelectric/antiferromagnetic perovskite PbFe<sub>1/2</sub>Ta<sub>1/2</sub>O<sub>3</sub>(PFT)
25
Citations
5
References
1984
Year
Materials ScienceMagnetismMultiferroicsOptical MaterialsPronounced PhotoconductivityEngineeringPhysicsSpontaneous BirefringenceOptical PropertiesFerroelectric ApplicationApplied PhysicsCondensed Matter PhysicsFerroelectric MaterialsQuantum MaterialsAbsorption EdgeSolid-state PhysicMagnetoelectric Materials
Abstract The spontaneous birefringence, Δns, of the rhombohedral ferroelectric phase of PFT has been measured between 20K and the hitherto unknown first order transition at 210K (heating)/205K (cooling). Above that transition a weakly birefringent phase is evinced, which undergoes a second order transition to cubic at ∼ 248K. Pronounced photoconductivity occurs below room temperature. A strong reversible temperature shift (-5. 7 cm-1K-1) of the absorption edge obscures the material upon heating.
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