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Influence of B-site chemical ordering on the dielectric response of the Pb(Sc<sub>1/2</sub>Nb<sub>1/2</sub>)O<sub>3</sub>relaxor
60
Citations
37
References
2001
Year
EngineeringSolid-state ChemistryHalide PerovskitesChemistryChemical B-site OrderingB-site ChemicalFerroelectric ApplicationSuperconductivityQuantum MaterialsDielectric ResponsePhase Transition TemperatureMaterials SciencePerovskite StructureLead-free PerovskitesCrystallographyMaterial AnalysisPhysicochemical AnalysisApplied PhysicsCondensed Matter PhysicsFerroelectric MaterialsThin FilmsFunctional Materials
The influence of chemical B-site ordering between Sc3+ and Nb5+ cations on the properties of the Pb(Sc1/2Nb1/2)O3 (PSN) relaxor has been investigated. Depending of the degree of ordering, PSN exhibits different behaviours. For a completely disordered material, a relaxor–ferroelectric phase transition is observed at 379 K by DSC. Ordering between Sc3+ and Nb5+ cations on the B-site of the perovskite structure leads to a non-homogeneous material constituted of two phases: ordered and disordered phases. The phase transition temperature of the ordered phase is confirmed to be lower (346 K) than that of the disordered phase. It appears that the phase transition of the disordered phase is shifted to lower temperature owing to the presence of the ordered phase.
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