Study of the elastic properties of the lithium tantalate crystal by the Brillouin laser light scattering
This article is dedicated to prof. J. Ranachowski The preparation of an experiment is described and measured values of elastic constants of the piezoelectric LiTaO3 crystal, which belongs to the rhomboedral symmetry system, are given. As the experimental method, the Brillouin laser light scatteri...
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| Format: | Article |
| Language: | English |
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Institute of Fundamental Technological Research Polish Academy of Sciences
2000-01-01
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| Series: | Archives of Acoustics |
| Online Access: | https://acoustics.ippt.pan.pl/index.php/aa/article/view/348 |
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| author | T. BŁACHOWICZ |
| author_facet | T. BŁACHOWICZ |
| author_sort | T. BŁACHOWICZ |
| collection | DOAJ |
| description | This article is dedicated to prof. J. Ranachowski
The preparation of an experiment is described and measured values of elastic constants of the piezoelectric LiTaO3 crystal, which belongs to the rhomboedral symmetry system, are given. As the experimental method, the Brillouin laser light scattering was applied and the constants from the hypersonic range of frequencies were measured. Appropriate conditions for the experimental configurations were determined by the use of a formalism based on the looking for eigenvalues of a so-called "characteristic matrix" which is a function of direction of the acoustic wave propagation and the elastic constants of the medium. Not all the measurement results are in full agreement with calculations based on ultrasonic data. A dispersion in the velocity of the acoustic waves can be observed for some direction of propagation due to the elastic constant changes in the hypersonic frequency range. |
| format | Article |
| id | doaj-art-d36fd02b05ba44afbf372d241f572655 |
| institution | Kabale University |
| issn | 0137-5075 2300-262X |
| language | English |
| publishDate | 2000-01-01 |
| publisher | Institute of Fundamental Technological Research Polish Academy of Sciences |
| record_format | Article |
| series | Archives of Acoustics |
| spelling | doaj-art-d36fd02b05ba44afbf372d241f5726552025-08-20T03:50:45ZengInstitute of Fundamental Technological Research Polish Academy of SciencesArchives of Acoustics0137-50752300-262X2000-01-01251Study of the elastic properties of the lithium tantalate crystal by the Brillouin laser light scatteringT. BŁACHOWICZ0Institute of Physics, Silesian University of TechnologyThis article is dedicated to prof. J. Ranachowski The preparation of an experiment is described and measured values of elastic constants of the piezoelectric LiTaO3 crystal, which belongs to the rhomboedral symmetry system, are given. As the experimental method, the Brillouin laser light scattering was applied and the constants from the hypersonic range of frequencies were measured. Appropriate conditions for the experimental configurations were determined by the use of a formalism based on the looking for eigenvalues of a so-called "characteristic matrix" which is a function of direction of the acoustic wave propagation and the elastic constants of the medium. Not all the measurement results are in full agreement with calculations based on ultrasonic data. A dispersion in the velocity of the acoustic waves can be observed for some direction of propagation due to the elastic constant changes in the hypersonic frequency range.https://acoustics.ippt.pan.pl/index.php/aa/article/view/348 |
| spellingShingle | T. BŁACHOWICZ Study of the elastic properties of the lithium tantalate crystal by the Brillouin laser light scattering Archives of Acoustics |
| title | Study of the elastic properties of the lithium tantalate crystal by the Brillouin laser light scattering |
| title_full | Study of the elastic properties of the lithium tantalate crystal by the Brillouin laser light scattering |
| title_fullStr | Study of the elastic properties of the lithium tantalate crystal by the Brillouin laser light scattering |
| title_full_unstemmed | Study of the elastic properties of the lithium tantalate crystal by the Brillouin laser light scattering |
| title_short | Study of the elastic properties of the lithium tantalate crystal by the Brillouin laser light scattering |
| title_sort | study of the elastic properties of the lithium tantalate crystal by the brillouin laser light scattering |
| url | https://acoustics.ippt.pan.pl/index.php/aa/article/view/348 |
| work_keys_str_mv | AT tbłachowicz studyoftheelasticpropertiesofthelithiumtantalatecrystalbythebrillouinlaserlightscattering |