 | | Mechanics of Solids
A Journal of Russian Academy of Sciences | | Founded
in January 1966
Issued 6 times a year
Print ISSN 0025-6544
Online ISSN 1934-7936 |
Archive of Issues
| Total articles in the database: | | 13427 |
| In Russian (Èçâ. ÐÀÍ. ÌÒÒ): | | 8178
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| In English (Mech. Solids): | | 5249 |
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| V.B. Shirokov, I.B. Mikhailova, A.S. Turchin, and V.V. Kalinchuk, "Thermomechanical and Thermophysical Properties of Lithium Niobate," Mech. Solids. 60 (6), 4513-4521 (2025) |
| Year |
2025 |
Volume |
60 |
Number |
6 |
Pages |
4513-4521 |
| DOI |
10.1134/S0025654425603350 |
| Title |
Thermomechanical and Thermophysical Properties of Lithium Niobate |
| Author(s) |
V.B. Shirokov (Southern Scientific Center of the RAS, Rostov-on-Donu, 344006 Russia;Southern Federal University, Rostov-on-Donu, 344090 Russia)
I.B. Mikhailova (Southern Scientific Center of the RAS, Rostov-on-Donu, 344006 Russia)
A.S. Turchin (Southern Scientific Center of the RAS, Rostov-on-Donu, 344006 Russia; Southern Federal University, Rostov-on-Donu, 344090 Russia)
V.V. Kalinchuk (Southern Scientific Center of the RAS, Rostov-on-Donu, 344006 Russia, vkalin415@mail.ru) |
| Abstract |
A new thermodynamic model of lithium niobate that is based on the use of the sixth-degree
Landau potential is proposed. Its feature is the nonlinear dependence of the coefficient at the square
of polarization along the polar direction on temperature. In contrast to the previously used fourthdegree potential, this ensures good agreement between the behavior of spontaneous polarization and
deformation calculated on its basis and the results of experimental studies. Using the proposed thermodynamic potential, a complete set of material constants determining the thermomechanical properties of lithium niobate, as well as constants of the electro-optical and acousto-optical effects in a
wide range of temperature changes, is constructed. Independence of the elastic moduli of lithium niobate from temperature is confirmed, in contrast to piezoelectric, acousto-optical and electro-optical
constants, some of which undergo significant changes. The results are of interest when choosing the
orientation of the crystal cut in the process of developing micro- and nanoscale acousto- and optoelectronic devices. |
| Keywords |
lithium niobate, Landau thermodynamic potential, material constants of linear equations of the piezoelectric effect, electro-optical constants, acousto-optical constants |
| Received |
23 June 2025 | Revised |
09 July 2025 | Accepted |
10 July 2025 |
| Link to Fulltext |
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