Abstract
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. Polarisationsmessungen in Abhängigkeit von der Temperatur werden an KTP-Eindomänen-Einkristallen mit isolierenden sowie mit leitenden Elektrodenanordnungen durchgeführt. Die Untersuchung bei niedrigen Temperaturen ermöglicht den pyroelektrischen Koeffizienten π = 2,97 nC cm−2 K−1 zu bestimmen, der in einem weiten Temperaturbereich konstant ist. Für den Fall, daß isolierende Elektroden verwendet werden, wird gezeigt, daß die Volumenladungskompensation des spontanen Polarisationsfeldes bei etwa 148K in Proben, die mit der Flußwachstumsmethode hergestellt wurden, auftritt.
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