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.
Evidence of double-loop hysteresis in disordered ferroelectric crystal / Parravicini J.; Fornasari L.; DelRe E.; Marabelli F.; Agranat A.J.; Parravicini G.. - In: JOURNAL OF APPLIED PHYSICS. - ISSN 0021-8979. - ELETTRONICO. - 127:(2020), pp. 184107-184107. [10.1063/1.5143524]
Evidence of double-loop hysteresis in disordered ferroelectric crystal
Parravicini J.
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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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