Ferroelectrics · 2001 · 14 citations · 1 references
Natural SciencesMaterials SciencePhysicsCondensed Matter PhysicsMaterials PhysicsSolid State PhysicsDielectric MaterialsDielectric PropertiesDielectricsElectrical ConductivityIonic ConductivityPhase TransitionsDielectric PermittivityFerroelectric PropertiesFerroelectricityFirst-order Phase TransitionsHysteresisIon MobilityPermittivityThermal Hysteresis
Abstract We present dielectric studies carried out on PbK2LiNb5O15 exhibiting its ferroelectric behaviour: the real part of dielectric constant follows a Curie law, with Tc = 639 K and a Curie constant 1.5x105 K. The structural change involves a first order phase transition evidenced by a thermal hysteresis and a εr′ discontinuity, and also an intermediate phase. An ionic conductivity, probably related with the Li+ ion mobility, is also evidenced. Key Words: phase transitionferroelectricloss factorconductivitydielectric permittivity
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