Structural and magnetic properties of high-pressure/high-temperature synthesized (Sr1-xRx)CoO3 (R = Y and Ho) perovskites

被引：38

作者：

Balamurugan, S. ^{[1
]}

Takayama-Muromachi, E. ^{[1
]}

机构：

[1] Natl Inst Mat Sci, Superconducting Mat Ctr, Tsukuba, Ibaraki 3050044, Japan

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2006年 / 179卷 / 07期

基金：

日本学术振兴会;

关键词：

perovskite; SrCoO3; YCoO3; HoCoO3; high-pressure synthesis; ferromagnetism;

D O I：

10.1016/j.jssc.2006.04.028

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Polyerystalline perovskite cobalt oxides Sr1-xRxCoO3 (R = Y and Ho; 0 <= x <= 1) were prepared by high-pressure/high-temperature technique. X-ray powder patterns of the Y-system indicated cubic perovskite form for 0 <= x <= 0.5, and orthorhombic perovskite form for x = 0.8 and 1.0, while coexisting of the two phases for x = 0.6. The cubic perovskite samples had metallic electric resistivities while the orthorhombic ones with semiconducting or insulating nature. The parent compound SrCoO3 showed a ferromagnetic transition at 266 K. With the Y substitution, the transition temperature increased slightly to similar to 275 K at x = 0.1, then decreased rapidly to similar to 60 K for x = 0.6. The YCoO3 (x = 1) sample showed non-magnetic behavior. The Ho-substituted system showed quite similar structural, transport and magnetic properties to those of the Y-system. (C) 2006 Elsevier Inc. All rights reserved.

引用

页码：2231 / 2236

页数：6

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