Raman-scattering observation of the rutile-to-CaCl2 phase transition in RuO2

被引：43
作者：
Rosenblum, SS
Weber, WH
Chamberland, BL
机构：
[1] ARIZONA STATE UNIV, DEPT BIOCHEM & CHEM, TEMPE, AZ 85287 USA
[2] UNIV MICHIGAN, DEPT PHYS, ANN ARBOR, MI 48109 USA
来源：
PHYSICAL REVIEW B | 1997年 / 56卷 / 02期
关键词：
D O I：
10.1103/PhysRevB.56.529
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Using a diamond-anvil cell, we have probed the pressure-induced rutile-to-CaCl2 ferroelastic phase transition in RuO2 with Raman spectroscopy. The transition is marked by a splitting Of the degenerate E-g mode of the rutile phase into two nondegenerate components and by an abrupt change in the Gruneisen parameters for all the phonons. The behavior of this splitting shows good agreement with Landau's theory for a second-order phase transition, application of which yields a transition pressure of 11.8+/-0.3 GPa.
引用
收藏
页码：529 / 533
页数：5
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