Poling Effects of Dielectric and Optical Properties on Pb(Zn1/3Nb2/3)1-xTixO3 Crystal
来源期刊：JOURNAL OF RARE EARTHS2006年增刊第1期
论文作者：Hugo Schmidt V Tu Chi Shun Chew L L Chien R R Wang Fu Tang
Key words：Pb(Zn1/3Nb2/3)1-xTixO3; dielectric permittivity; phase transitions; refractive indices;
Abstract: Dipolar relaxation and dielectric/piezoelectric resonance in a (001)-cut Pb(Zn1/3Nb2/3)0.9Ti0.1O3 (PZNT10%) single crystal before and after electric (E)-field poling were presented. Dielectric permittivities were measured as functions of temperature, frequency and poling E-field strength. Frequency-dependent dielectric spectroscopy in the poled sample exhibits multiple piezoelectric resonances between 0.1 and 1 MHz, which can be described by the forced-damped-oscillator model. The resonant spectra show significant changes while phase transitions are taking place. The unpoled crystal shows almost no optical birefringence, indicating that the average structure symmetry is isotropic. Birefringence of the crystal is significantly enhanced by a prior E-field poling.
Hugo Schmidt V1，Tu Chi Shun2，Chew L L3，Chien R R1，Wang Fu Tang2
(1.Department of Physics, Montana State University, Bozeman, MT 59717, USA;
2.Graduate Inst.of Applied Science and Engineering, Fu Jen University, Taipei 242, China;
3.Department of Mechanical Engineering, National University of Singapore, Singapore)
Abstract:Dipolar relaxation and dielectric/piezoelectric resonance in a (001)-cut Pb(Zn1/3Nb2/3)0.9Ti0.1O3 (PZNT10%) single crystal before and after electric (E)-field poling were presented. Dielectric permittivities were measured as functions of temperature, frequency and poling E-field strength. Frequency-dependent dielectric spectroscopy in the poled sample exhibits multiple piezoelectric resonances between 0.1 and 1 MHz, which can be described by the forced-damped-oscillator model. The resonant spectra show significant changes while phase transitions are taking place. The unpoled crystal shows almost no optical birefringence, indicating that the average structure symmetry is isotropic. Birefringence of the crystal is significantly enhanced by a prior E-field poling.
Key words:Pb(Zn1/3Nb2/3)1-xTixO3; dielectric permittivity; phase transitions; refractive indices;
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