High pressure structural study of SmNiO3

被引：29

作者：

Amboage, M

Hanfland, M

Alonso, JA

Martínez-Lope, MJ

机构：

[1] European Synchrotron Radiat Facil, F-38043 Grenoble, France

[2] CSIC, Inst Ciencia Mat Madrid, E-28049 Madrid, Spain

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2005年 / 17卷 / 11期

关键词：

D O I：

10.1088/0953-8984/17/11/006

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The structural changes of SmNiO3 under high pressure have been studied by means of x-ray powder diffraction with synchrotron radiation in a diamond anvil cell. The orthorhombic perovskite structure transforms into the less distorted R3c rhombohedral structure at a pressure of 26 GPa. The volume versus pressure data are well described by a single Murnaghan equation of state, which yields a bulk modulus of 167 GPa. At 2.5 GPa the cell parameter b undergoes a small abrupt contraction that we propose is related to the expected pressure-induced metallization.

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页码：S783 / S788

页数：6

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