Variation of the refractive index and polarizability of sapphire under high pressures
| Autor: | J. P. Denis, Naira Maria Balzaretti, J. A. H. da Jornada |
|---|---|
| Rok vydání: | 1993 |
| Předmět: |
Física da matéria condensada
Fisica de altas pressoes chemistry.chemical_classification Condensed matter physics business.industry Hydrostatic pressure General Physics and Astronomy Diamond anvil cell Physics::Geophysics law.invention Condensed Matter::Materials Science Optics chemistry Volume (thermodynamics) law Polarizability Condensed Matter::Superconductivity Sapphire Hydrostatic equilibrium business Inorganic compound Refractive index |
| Zdroj: | Repositório Institucional da UFRGS Universidade Federal do Rio Grande do Sul (UFRGS) instacron:UFRGS |
| ISSN: | 1089-7550 0021-8979 |
| DOI: | 10.1063/1.353240 |
| Popis: | In this article we present the experimental results for the pressure variation of the refractive index of sapphire up to 16 GPa, obtained with an interferometric method, using the diamond anvil cell. In the range of hydrostatic pressures, up to about 12 GPa, the analysis of the results with the classic Lorentz-Lorenz approach provides a nearly linear relation between polarizability (cr) and volume, corresponding to a constant strain polarizability parameter. For pressures above 12 GPa, there is a substantial nonlinear deviation, associated with nonhydrostatic effects inside the diamond anvil cell. |
| Databáze: | OpenAIRE |
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