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Cation arrangement in the complex perovskites and vibrational spectra
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1998
Year
Materials ScienceInorganic ChemistryMultiferroicsComplex PerovskitesEngineeringPerovskite Solar CellPerovskite ModuleCation ArrangementCondensed Matter PhysicsPerovskite MaterialsApplied PhysicsQuantum MaterialsHalide PerovskitesVibrational Spectrum AnalysisChemistryLead-free PerovskitesFunctional Materials
Vibrational spectrum analysis was used to study the cation arrangement in the complex perovskites. The transition from the ideal perovskite structure ABO3 to complex compositions with a pair of the A or B cations, such as A1/2′A1/2″BO3 or AB1/2′B1/2″O3, leads to drastic changes in the Raman spectra. Correlation between a change in the Raman spectra and the recent structure analysis by advanced direct methods is discussed for some important ‘model’ compounds, such as relaxor ferroelectrics PbSc1/2Ta1/2O3 (PST), PbMg1/3Nb2/3O3 (PMN) and Na1/2Bi1/2TiO3 (NBT) and the low-dielectric material BaMg1/3Ta2/3O3 (BMT). © 1998 John Wiley & Sons Ltd.