First- and second-order phase transitions in ternary europium phosphides with ThCr2Si2-type structure

被引：39

作者：

Huhnt, C

Schlabitz, W

Wurth, A

Mewis, A

Reehuis, M

机构：

[1] Univ Koln, Inst Phys 2, D-50937 Koln, Germany

[2] Univ Dusseldorf, Inst Anorgan Chem & Strukturchem, D-40225 Dusseldorf, Germany

[3] Hahn Meitner Inst Kernforsch Berlin GmbH, D-14109 Berlin, Germany

来源：

PHYSICA B | 1998年 / 252卷 / 1-2期

关键词：

ThCr2Si2; structure; structural phase transitions; valence instability;

D O I：

10.1016/S0921-4526(97)00904-6

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The ThCr2Si2- type compounds EuFe2P2 and EuRu2P2 exhibit as a function of pressure continuous phase transitions which are accompanied by extremely strong changes of the lattice parameters and particularly of the P-P distance d(P-P) along the tetragonal c-axis. In the isostructural integralvalent LaT2P2 compounds similar phase transitions of second (T = Fe) and first order (T = Co) occur as a Function of pressure indicating that the T element essentially determines the nature of the phase transition. The different types of phase transitions are explained phenomenologically. (C) 1998 Elsevier Science B.V, All rights reserved.

引用

页码：44 / 54

页数：11

共 19 条

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CHEFKI M, IN PRESS PHYS REV LE

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