EXTENDED X-RAY-ABSORPTION FINE-STRUCTURE STUDY OF THE JAHN-TELLER PHASE-TRANSITIONS IN CSCRCL3 AND RBCRCL3 HEXAGONAL PEROVSKITES

被引：6

作者：

GOTA, S

GARCIA, J

CHABOY, J

BARTOLOME, J

机构：

[1] Instituto de Ciencia de Materiales de Aragn, Consejo Superior de Investigaciones Científicas, Universidad de Zaragoza

来源：

PHYSICAL REVIEW B | 1991年 / 44卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.44.11632

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The local structure of the (CrCl6) complex, in the different phases of CsCrCl3 and RbCrCl3 compounds, is determined by means of the extended x-ray-absorption fine-structures technique. It is proved that the complexes are distorted (elongated) in the high-temperature symmetrical (P63/mmc) alpha-phase and in the intermediate (C2/m) beta-phase present in RbCrCl3. The disortion amounts to rho-0 = 0. 39 angstrom at all temperatures. These results clarify the validity of the different conjectures on the possibility of distortion in the alpha-phase derived from different experimental techniques.

引用

页码：11632 / 11639

页数：8

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