Double-loop electric-field vs polarization hysteresis is investigated in a depoled compositionally disordered lithium-enriched potassium tantalate niobate crystal. Comparing electro-optic response and dielectric spectroscopy indicates that the anomalous response occurs for those temperatures in which the sample also manifests a temperature hysteresis in the low-frequency dielectric function. An electric-field hysteresis at concurrent temperatures suggests an underlying role of reorienting mesoscopic polar regions that accompany the nonergodic phase.
Parravicini, J., Fornasari, L., Delre, E., Marabelli, F., Agranat, A., Parravicini, G. (2020). Evidence of double-loop hysteresis in disordered ferroelectric crystal. JOURNAL OF APPLIED PHYSICS, 127(18) [10.1063/1.5143524].
Evidence of double-loop hysteresis in disordered ferroelectric crystal
Parravicini, JacopoPrimo
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2020
Abstract
Double-loop electric-field vs polarization hysteresis is investigated in a depoled compositionally disordered lithium-enriched potassium tantalate niobate crystal. Comparing electro-optic response and dielectric spectroscopy indicates that the anomalous response occurs for those temperatures in which the sample also manifests a temperature hysteresis in the low-frequency dielectric function. An electric-field hysteresis at concurrent temperatures suggests an underlying role of reorienting mesoscopic polar regions that accompany the nonergodic phase.
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