Optical Interferometric Technique for Induced Strain Ferroelectric Loop Study at Low Frequency

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Abstract:

Michelson interferometric technique was modified in the setup and used to measure very small changes in optical path length for electric field induced-strain phenomena. Induced-strain is established in the sample when the beam of light propagating through the sample surface undergoes a shift in phase, which in turn leads to a change in the intensity of the interference pattern formed where the reference and probing beams recombine. In this work the electric field induced-strain was measured as a function of electric field (s-E loop) and polarization (s-P loop) of PbMg1/3Nb2/3O3 (PMN) and 0.7PbMg1/3Nb2/3O3-0.3PbZr0.52Ti0.48O3 (0.7PMN-0.3PZT) ceramics, which showed electrostrictive (quadratic shape curve) and piezoelectric (butterfly shape curve) behavior at various frequency (0.01-1Hz).

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110-114

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June 2014

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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