Magnetism, structure and transport of Y1-xCaxCoO3 and La1-xBaxCoO3

被引：14

作者：

Hejtmanek, J.

Jirak, Z.

Knizek, K.

Marysko, M.

Veverka, M.

Fujishiro, H.

机构：

[1] Acad Sci Czech Republ, Inst Phys, Prague 18221 8, Czech Republic

[2] Iwate Univ, Fac Engn, Dept Mat Sci & Technol, Morioka, Iwate 0208551, Japan

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2004年 / 272卷

关键词：

cobaltite; spin state;

D O I：

10.1016/j.jmmm.2003.12.679

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We compare the magnetic, structural and transport properties of La1=xBaxCoO3 and Y1-xCaxCoO3 perovskites. The experimental data supported by ab initio calculations reveal that: (i) Y-based perovskites are up to room temperature represented by essentially insulating LS state (T < 300 K) followed by a gradual increase to IS state (S similar to 1) with enhanced conductivity above 500 K; (ii) the magnetic interactions in La-based perovskites are antiferromagnetic with S similar to 1: 5 (T > 700 K) and (iii) the Ba doping induces the ferromagnetic correlations and leads to a highly conducting state above 600 K: (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：E283 / E284

页数：2