The temperature dependence of the pressure switching of Jahn-Teller deformation in the deuterated ammonium copper Tutton salt

被引：20

作者：

Augustyniak, MA ^{[1
]}

Krupski, L ^{[1
]}

机构：

[1] Polish Acad Sci, Inst Mol Phys, PL-60179 Poznan, Poland

来源：

CHEMICAL PHYSICS LETTERS | 1999年 / 311卷 / 3-4期

关键词：

D O I：

10.1016/S0009-2614(99)00806-4

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The pressure switch of the Jahn-Teller deformation direction in (ND4)(2)Cu(SO4)(2). 6D(2)O was investigated in the temperature range 130-320 K. Below 295 K, the new, pressure-induced phase, is stable ender ambient pressure. Switching back is observed on heating to above 297 K. In the range 150-295 K a strong temperature dependence of the switching pressure (from 24 to 450 MPa) is observed. Below 150 K, the switching process is slow and a coexistence of two phases is observed. We conclude that the switch of the Cu(D2O)(6) complex deformation direction is the Jahn-Teller response to the changes in the hydrogen bond system. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：126 / 130

页数：5

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