DC Conductivity of Potassium Titanyl Phosphate Crystal along ITS Z-AXIS

Abstract

The J-U relation of the KTP crystal along its z-axis under low DC field deviates from linearity, which is different from that of the crystal along the other two principle axis. The resistance of the crystal along its z-axis increases with the time under high DC stress and the crystal becomes dark. The dark color can be removed by annealing. Electrode reactions were also observed. The phenomena are related to the easy movement of ions along the z-axis of the KTP crystal.

DC Ionic Conductivity in KTP and Its Isomorphs: Properties, Methods for Suppression, and Its Connection to Gray Tracking

“…Several attempts to reduce the ionic conductivity in KTP-type crystals can be found in the literature [5,[14][15][16][17]. However, most investigations analyse the AC conductivity [18][19][20], whereas the DC conductivity is not analysed in detail [21,22]. A reduction of the ionic conductivity can be achieved by a reduction of the temperature.…”