VARIATION OF THE REFRACTIVE-INDEX AND POLARIZABILITY OF SAPPHIRE UNDER HIGH-PRESSURES

被引:19
作者
BALZARETTI, NM [1 ]
DENIS, JP [1 ]
DAJORNADA, JAH [1 ]
机构
[1] CNRS,PHYSICOCHIM MAT LAB,F-92190 MEUDON,FRANCE
关键词
D O I
10.1063/1.353240
中图分类号
O59 [应用物理学];
学科分类号
摘要
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 (alpha) 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.
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页码:1426 / 1429
页数:4
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