Pressure-induced phase transition and stability of EuO and EuS with NaCl structure

被引：10

作者：

Gour, Atul ^{[1
]}

Singh, Sadhna ^{[1
]}

Singh, R. K. ^{[2
]}

Singh, M. ^{[3
]}

机构：

[1] Barkatullah Univ, Dept Phys, Bhopal 462026, India

[2] Chaudhary Devi Lal Univ, Inst Profess & Sci Studies & Res, Sirsa 125055, India

[3] Govt SPSPG Coll, Ganjbasoda 464221, Vidhisa, India

来源：

PRAMANA-JOURNAL OF PHYSICS | 2008年 / 71卷 / 01期

关键词：

high pressure; phase transition; three-body interaction;

D O I：

10.1007/s12043-008-0151-8

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have predicted the phase transition pressures and corresponding relative volume changes of EuO and EuS having NaCl-type structure under high pressure using three-body interaction potential (TBIP) approach. In addition, the conditions for relative stability in terms of modified Born criterion has been checked. Our calculated results of phase transitions, volume collapses and elastic behaviour of these compounds are found to be close to the experimental results. This shows that the inclusion of three-body interaction effects makes the present model suitable for high pressure studies.

引用

页码：181 / 186

页数：6

共 11 条

[1]

Cochran W., 1971, Critical Reviews in Solid State Sciences, V2, P1, DOI 10.1080/10408437108243425

[2]

Demarest H., 1977, HIGH PRESSURE RES, P281

[3] OUTER-SHELL OVERLAP INTEGRALS AS A FUNCTION OF DISTANCE FOR HALOGEN-HALOGEN HALOGEN-ALKALI AND ALKALI-ALKALI IONS IN ALKALI HALIDE LATTICES [J].