Abstract
The surface excitation of ultrasonic waves as a new method of investigation of piezoelectric properties of materials is suggested and experimental results specified to theZ-direction of a single crystal of triglycine sulphate (TGS) are reported. It has been found that the piezoelectric stress constant e23 of TGS depends on temperatureθ as:e 23=K 23(θc−θ)−1 whereK 23=(31±0.5) As m−2 deg andθ c=49.6°C.
The influence of an externally applied d.c. electric field has been studied in order to account for a residual excitation of ultrasonic waves in TGS at temperatures above the Curie point.
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The author is indebted for several stimulating discussions on the above subject to Dr. J.Ďurček and Dr J.Fousek.
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Baják, I.L. Investigation of piezoelectric properties of crystals using surface excitation of ultrasonic waves and some results for ferroelectric triglycine sulphate. Czech J Phys 25, 72–82 (1975). https://doi.org/10.1007/BF01589674
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DOI: https://doi.org/10.1007/BF01589674