Pyroelectric properties of RbTiOAsO4 single crystals in the 4.2-300 K temperature range

Yu V. Shaldin, S. Matyjasik, M. Tseitlin, E. Mojaev*, M. Roth

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The temperalure dependence of the pyroelectric coefficient, λs, of RbTiOAsO4 single crystals grown by seeded pulling from high-temperature self-fluxes has been studied in the low-temperature range. The results show that in the 4.2-250 K temperature range the λs (T) behavior is similar to those of the isomorphic crystals belonging to the KTP (KTiOPO4) family of compounds, and at temperature of 250 K the RTA pyroelectric coefficient λs=-(5.6 ± 0.3) × 10-5 C/m2 K. However, at temperatures above 275 K, the superionic conductivity increases significantly, while the electrical conductivity originating from the release of charge carriers associated with trace impurity point defects increases additionally above room temperature. These effects have been taken into account in experimental evaluation of the true λs values, especially above 275 K. The peculiarities revealed in the RTA pyroelectric coefficient temperature dependence are also discussed in terms of the structural changes associated with the temperature increase and isomorphic ion substitutions.

Original languageEnglish
Pages (from-to)452-456
Number of pages5
JournalPhysica Status Solidi (B): Basic Research
Volume246
Issue number2
DOIs
StatePublished - Feb 2009

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