Jahn-Teller effect under pressure

被引：5

作者：

Aguado, F. ^{[1
]}

Rodriguez, F. ^{[1
]}

机构：

[1] Univ Cantabria, Fac Ciencias, DCITIMAC, E-39005 Santander, Spain

来源：

HIGH PRESSURE RESEARCH | 2006年 / 26卷 / 04期

关键词：

Mn3+; CU2+; Jahn-Teller effect; spectroscopy under pressure; layer perovskite;

D O I：

10.1080/08957950601104427

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

This work deals with structural correlation studies in Jahn-Teller (JT) systems of Cu2+ and Mn3+ in the layer perovskites A(2)CuCl(4) and AMnF(4). The aim is to explore the influence of the JT effect on the materials' properties as well as its variation with pressure. We present structural studies carried out in the layer perovskites AMnF(4) by optical spectroscopy under pressure in order to explore whether pressure reduces the JT distortion or induces tilting phenomena of the JT octahedra (MnF6)(3-). The influence of the JT effect on the stabilization of the ground-state spin, either high-spin (HS) or low-spin (LS), in Mn3+ is analyzed. This knowledge is important to understand and, eventually predict, magnetic, electrical and optical properties in connection with HS-LS phenomena. The results are compared with previous structural studies performed in the (CuCl6)(4-) JT octahedra formed in A(2)CuCl(4).

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收藏

页码：319 / 323

页数：5

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