| Presentation | 1997/9/26 Elastic constants of multi-domain LiTaO_3 crystal Izumi Takanaga, Jun-ichi Kushibiki, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Studies on chemical composition changes for LiNbO_3 single crystals and on elastic inhomogeneities for LiTaO_3 wafers, due to residual multi-domains, have been conducted with data of velocity changes of leaky surface acoustic waves (LSAWs) obtained by line-focus-beam acoustic microscopy. However, the LSAW velocity variations observed on 36°YX-LiTaO_3 substrates, due to residual multi-domains, have not been quantitatively explained. It has been, therefore, pointed out that knowledge of the elastic properties of multi-domain crystals, as well as of single-domain crystals, is essentially needed for quantitative analyses of the velocity variations. In this paper, velocities of bulk waves and LSAWs, and density are measured for multi-domain (depoled) LiTaO_3 specimens, and all the independent components of the elastic constants are determined for the first time. The experimental results of LSAW velocities measured as a function of propagation direction for a multi-domain 36°YX-LiTaO_3 wafer are quantitatively understood, being in excellent agreement with the calculated results using the determined clastic constants. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | ferroelectric single crystal / LiTaO_3 / residual multi-domains / multi-domain crystal / velocity measurement / elastic constant |
| Paper # | US97-54 |
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| Conference Information | |
| Committee | US |
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| Conference Date | 1997/9/26(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Ultrasonics (US) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Elastic constants of multi-domain LiTaO_3 crystal |
| Sub Title (in English) | |
| Keyword(1) | ferroelectric single crystal |
| Keyword(2) | LiTaO_3 |
| Keyword(3) | residual multi-domains |
| Keyword(4) | multi-domain crystal |
| Keyword(5) | velocity measurement |
| Keyword(6) | elastic constant |
| 1st Author's Name | Izumi Takanaga |
| 1st Author's Affiliation | Department of Electrical Engineering, Faculty of Engineering, Tohoku University() |
| 2nd Author's Name | Jun-ichi Kushibiki |
| 2nd Author's Affiliation | Department of Electrical Engineering, Faculty of Engineering, Tohoku University |
| Date | 1997/9/26 |
| Paper # | US97-54 |
| Volume (vol) | vol.97 |
| Number (no) | 277 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |