Electrical Conduction in Deuterated Ammonium Dihydrogen Phosphate Crystals with Different Degrees of Deuteration
ZHU Li-Li1,2, GAN Xiao-Yu1,2, ZHANG Qing-Hua3, LIU Bao-An1,2, XU Ming-Xia1,2, ZHANG Li-Song1,2, XU Xin-Guang1,2, GU Qing-Tian1,2**, SUN Xun1,2**
1State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100 2Key Laboratory of Functional Crystal Materials and Device of Ministry of Education, Shandong University, Jinan 250100 3Chengdu Fine Optical Engineering Research Centre, Chengdu 610041
Abstract：Conductivity measurements of deuterated ammonium dihydrogen phosphate (DADP) crystals with different deuterated degrees are described. The conductivities increase with the deuterium content, and the value of the a-direction is larger than that of the c-direction. Compared with DKDP crystals, DADP crystals have larger conductivities, which is partly due to the existence of A defects. The ac conductivity over the temperature range 25–170°C has shown a knee in the curve of ln(σT) versus T?1. The conductivity activation energy calculated by the slope of the high temperature region decreases with the deuterium content. The previously reported phase transition is not seen.
2015, Vol. 32 
