Applied Physics Letters · 2005 · 50 citations · 8 references
Natural SciencesMaterials EngineeringMaterials ScienceCeramic MaterialsCeramicsMaterials PhysicsDielectric MaterialsDielectric PropertiesDielectricsElectrical Properties Of CeramicsFerroelectric MaterialsPerovskite MaterialsAntiferroelectric CeramicsAntiferroelectric MaterialsFerroelectric PropertiesFerroelectricityPyroelectric CeramicsPyroelectric MaterialsPyroelectric PropertiesPyroelectricity
Pb 0.97 La 0.02 ( Zr 0.65 Sn 0.22 Ti 0.13 ) O 3 ceramic was confirmed to be in an antiferroelectric (AFE) phase at T<170°C by macroscopic and microscopic studies. The electric-field-induced ferroelectric (FE) state was found to exhibit a much longer lifetime than the reasonable laboratory measuring time scale at T<60°C, which has led to the frequent misinterpretation of this material system as FE. The dc bias dependence of the dielectric and pyroelectric properties was studied as a function of temperature. The poled sample exhibited a low dissipation factor (tanδ∼0.03), a large transient pyroelectric coefficient of the order of 10−3–10−2Cm−2K−1, and excellent dc tunability at the FE-to-AFE transition temperature (39°C∕kV∕mm). The possible application of this material to uncooled tunable pyroelectric thermal sensing is also discussed.
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