Revisiting the Sr-Cr(IV)-O system at high pressure and temperature with special reference to Sr3Cr2O7

被引：25

作者：

Castillo-Martinez, Elizabeth

Angel Alario-Franco, Miguel ^{[1
]}

机构：

[1] Univ Complutense, Dept Quim Inorgan 1, E-28040 Madrid, Spain

[2] Univ Complutense, Lab Compultense Altas Pres, E-28040 Madrid, Spain

来源：

SOLID STATE SCIENCES | 2007年 / 9卷 / 07期

关键词：

Cr(IV)-perovskite; Sr3Cr2O7; Ruddlesden-Popper; high pressure high temperature synthesis; electron microscopy; microstructure; 2D-anfiferromagnet;

D O I：

10.1016/j.solidstatesciences.2007.02.008

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

High pressure and temperature are used to synthesise perovskite related phases in the Sr-Cr(IV)-O system. The n = 1, 2 and infinity members of the Srn+1CrnO3n+l family have been obtained. Another new member, n = 3 as well as an hexagonal layered perovskite have also been observed by transmission electron microscopy and electron diffraction. The average structure of Sr3Cr2O7 as determined by XRD has space group I4/ mmm, whereas its microstructure includes a large amount of defects both in the layer stacking and within the layers. 2D magnetism and a large electrical resistance in Sr3Cr2O7 are observed as opposed to the nonlocalized electronic behaviour of SrCrO3 (c) 2007 Elsevier Masson SAS. All rights reserved.

引用

页码：564 / 573

页数：10

共 34 条

[1] Strong ferromagnetic coupling in the K2NiF4-structured oxide La0.8Sr1.2Mn0.6Rh0.4O4 [J].