Temperature Dependence of Polarization in KTiOPO4 Single Crystals

Polarization measurements as a function of temperature are performed on KTP monodomain single crystals, in both, insulating and conducting electrode arrangements. The low temperature study allows to determine the pyroelectric coefficient π = 2.97 nC cm−2 K−1 which is constant over a wide temperature range. In the case where insulating electrodes are employed it is shown that bulk charge compensation of the spontaneous polarization field occurs around 148K in the flux-grown samples.