TY - JOUR
T1 - Pyroelectric properties of RbTiOAsO4 single crystals in the 4.2-300 K temperature range
AU - Shaldin, Yu V.
AU - Matyjasik, S.
AU - Tseitlin, M.
AU - Mojaev, E.
AU - Roth, M.
PY - 2009/2
Y1 - 2009/2
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=59449106834&partnerID=8YFLogxK
U2 - 10.1002/pssb.200844294
DO - 10.1002/pssb.200844294
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AN - SCOPUS:59449106834
SN - 0370-1972
VL - 246
SP - 452
EP - 456
JO - Physica Status Solidi (B): Basic Research
JF - Physica Status Solidi (B): Basic Research
IS - 2
ER -