Ferroelastic phase transition in rutile-type germanium dioxide at high pressure

被引：40

作者：

Haines, J

Leger, JM

Chateau, C

Bini, R

Ulivi, L

机构：

[1] CNRS, Lab Physicochim Mat, F-92190 Meudon, France

[2] European Lab Nonlinear Spect, I-50125 Florence, Italy

[3] CNR, Ist Elettron Quantist, I-50127 Florence, Italy

来源：

PHYSICAL REVIEW B | 1998年 / 58卷 / 06期

关键词：

D O I：

10.1103/PhysRevB.58.R2909

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Rutile-type GeO2 was found to undergo a proper ferroelastic transition at 26.7(2) GPa from Raman spectroscopic measurements. The B-1g optic mode softens up to this pressure and then becomes a hard A(g) mode. The square of these mode frequencies varies linearly with pressure in accordance with the soft-mode theory of second-order phase transitions. The present results have enabled a systematic relationship between the square of the soft-mode frequency at ambient pressure and the critical pressure in the homologous series SiO2, GeO2, and SnO2 to be identified.

引用

页码：R2909 / R2912

页数：4

共 16 条

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