Dielectric properties of $RbTiOAsO4$ single crystals

Using the impedance analysis, we obtain the dielectric constants of $RbTiOAsO4$ (RTA) single crystals for the three principle crystallographic axes in the frequency range of 1 kHz–6 MHz and in the temperature range of 303–1123 K. The conductivity of RTA along the polar c axis is five orders-of-magnitude smaller than that of $KTiOPO4$ (KTP) in the temperature range of 500–970 K. The conductivities of RTA along the three principle axes have the same order of magnitude, $10−5 Ω−1 m−1$ at 720 K, which is contrasted with the high anisotropy shown in KTP.