Electric field influence on elasticity of crystals
This paper presents the results of an experimental study of how an electric field affects the position of the plane of polarization of a transverse elastic wave and the acoustooptical interaction in the LiTaO3 crystal. It is established that an electric field of ±1×106 V/m rotates the plane of polariz...
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| Main Authors: | , |
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| Format: | article |
| Language: | EN |
| Published: |
D.Ghitu Institute of Electronic Engineering and Nanotechnologies
2007
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| Subjects: | |
| Online Access: | https://doaj.org/article/2e88f9a90e5f4ff8bf119ef7877b5eca |
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| Summary: | This paper presents the results of an experimental study of how an electric field affects the position of the plane of polarization of a transverse elastic wave and the acoustooptical interaction in the LiTaO3 crystal. It is established that an electric field of ±1×106 V/m rotates the plane of polarization of a sound wave with frequency 580 MHz passing through 1 cm of a
crystal by 2.5 degree. The variation of the resonance frequency of piezoelectric cavities subjected to a constant electric field is also demonstrated with longitudinal vibrations in La3Ga5SiO14 crystal rods at temperatures between –60 and 80°C. For a field of ±1,5×10 6
V/m and α = 15°, the relative change of the frequency is ±120×10
–6. It is shown that La3Ga5SiO14 crystals offer a set of physical parameters that makes them promising for electrically controlled and nonlinear acoustoelectronic devices. |
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