On the Connection between Isofrequency Temperature Dependences of Inelastic Light Scattering and Dielectric Anomalies in Lithium Niobate Crystals
The isofrequency temperature dependence of inelastic light scattering intensity in ferroelectric LiNbO3 crystals at frequencies of Ω = 15 to 100 cm−1 and at different scattering geometries is discussed. The parameters of an effective soft mode are obtained. A comparison is made of the experimental r...
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| Veröffentlicht in: | Physica status solidi. B. Basic research 1983-11, Vol.120 (1), p.131-136 |
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| container_title | Physica status solidi. B. Basic research |
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| creator | Gorelik, V. S. Umarov, B. S. Umarov, M. |
| description | The isofrequency temperature dependence of inelastic light scattering intensity in ferroelectric LiNbO3 crystals at frequencies of Ω = 15 to 100 cm−1 and at different scattering geometries is discussed. The parameters of an effective soft mode are obtained. A comparison is made of the experimental results with the simplest variant of the light scattering theory near the phase transition point. The Curie‐Weiss constant and temperature shift coefficient of the soft mode frequency are determined. The applicability is shown of the approximation of one effective soft mode in the region of low frequencies near the phase transition point in the crystal examined.
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| doi_str_mv | 10.1002/pssb.2221200114 |
| format | Article |
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| ispartof | Physica status solidi. B. Basic research, 1983-11, Vol.120 (1), p.131-136 |
| issn | 0370-1972 1521-3951 |
| language | eng |
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| source | Wiley Online Library All Journals |
| subjects | Condensed matter: electronic structure, electrical, magnetic, and optical properties Exact sciences and technology Infrared and raman spectra and scattering Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation Physics |
| title | On the Connection between Isofrequency Temperature Dependences of Inelastic Light Scattering and Dielectric Anomalies in Lithium Niobate Crystals |
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