Investigation of CuInP2S6 Family Layered Crystals For Ultrasonic Transducers
Investigation results of piezoelectric and dielectric (20 Hz –1 MHz) properties of layered CuInP2S6 crystals with different compositions and stoichiometry are presented. It was shown that largest phase transition temperature Tc ≈ 330 K was observed for indium rich CuInP2S6 crystals. In these CuIn1+δP2S6 crystals at room temperature electromechanical coupling constant comparable to that of pure CuInP2S6 could be obtained after appropriate poling. Critical dielectric anomalies are found at the phase transitions. It was shown that above phase transition the dielectric properties are strongly influenced by high electrical conductivity. The DC conductivity and conductivity relaxation time exhibits an anomaly close to the phase transition temperature Tc=330 K. Its activation energy exhibit only a weak change close to the ferrielectric phase transition temperature in investigated crystals.
A. Dziaugys J. Banys V. Samulionis Yulian Vysochanskii
Departament of Radiophysics,Faculty of Physics,Vilnius University,Lithuania Institute of Solid State Physics and Chemistry of Uzhgorod University,Ukraine
国际会议
西安
英文
116-120
2009-08-23（万方平台首次上网日期，不代表论文的发表时间）