Title :
The effect of photo-refractively induced periodic strain grating on piezoelectric vibration in LiNbO3:Fe
Author :
Ohki, Michio ; Taniguchi, Nobuyuki ; Shiosaki, Tadashi
Author_Institution :
Dept. of Electron., Kyoto Univ., Japan
fDate :
30 Aug-2 Sep 1992
Abstract :
Strong nonlinear behavior was observed in an LiNbO3:Fe piezoelectric resonator with a photorefractive periodic grating. The resonator is a y-cut plate with Au electrodes totally or partially deposited on both faces. The current-voltage and the admittance-frequency characteristics show nonlinear behavior such as hysteresis only near the resonance frequency. In some conditions, the current changes negatively with the voltage. These characteristics depend on the Q-value of the resonator. The present nonlinear phenomena do not occur when the Q-value is too large, while they occur at larger values of Q in usual resonators. It was found that the Q-value of the resonator with the photorefractive grating varied when the resonator was annealed or when the period of the grating was changed
Keywords :
crystal resonators; diffraction gratings; iron; lithium compounds; photorefractive materials; piezoelectric materials; piezoelectric oscillations; Au electrodes; LiNbO3:Fe piezoelectric resonator; Q-value; admittance-frequency characteristics; current-voltage characteristics; faces; hysteresis; nonlinear behavior; period; photo-refractively induced periodic strain grating; photorefractive periodic grating; piezoelectric vibration; resonance frequency; y-cut plate; Capacitive sensors; Electrodes; Gold; Gratings; Hysteresis; Iron; Photorefractive effect; Resonance; Resonant frequency; Voltage;
Conference_Titel :
Applications of Ferroelectrics, 1992. ISAF '92., Proceedings of the Eighth IEEE International Symposium on
Conference_Location :
Greenville, SC
Print_ISBN :
0-7803-0465-9
DOI :
10.1109/ISAF.1992.300650
