Magnetic and M-I Transitions in YBaCo2O5+x (O≤x≤0.5)

被引：43

作者：

Akahoshi, D ^{[1
]}

Ueda, Y ^{[1
]}

机构：

[1] Univ Tokyo, Inst Solid State Phys, Mat Design & Characterizat Lab, Minato Ku, Tokyo 1068666, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1999年 / 68卷 / 03期

关键词：

YBaCo2O5+x; oxygen non-stoichiometry; metal-insulator transition; magnetic transition; one-dimensional ordering of oxygen atoms;

D O I：

10.1143/JPSJ.68.736

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Three compounds, orthorhombic YBaCo2O5.5, tetragonal YBaCo2O5.5 and YBaCo2O5.0, have been synthesized and their structural, magnetic and electrical properties have been investigated. The structures of all three compounds have a CoO2-Y(O)-CoO2 block layer sandwiched between the BaO layers. Magnetic and metal-insulator transitions have been observed in orthorhombic YBaCo2O5.5 which has a one-dimensional ordering of oxygen atoms along the b-axis in the Y(O) layers. Tetragonal YBaCo2O5.5 and YBaCo2O5.0, which are both semiconductive. show magnetic transitions. The physical properties of YBaCo2O5+x strongly depend on the structure and oxygen content.

引用

页码：736 / 739

页数：4

共 7 条

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