Tunnelling magnetoresistance of misfit layered cobaltite Ca3-xYxCo4O9 (x=0, 0.1, 0.2)

被引：5

作者：

Noguchi, S ^{[1
]}

Sekimoto, T

Ishida, T

机构：

[1] Osaka Prefecture Univ, Dept Phys & Elect, Sakai, Osaka 5998531, Japan

[2] JST CREST, Kawaguchi, Saitama 3320012, Japan

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2004年 / 16卷 / 48期

关键词：

D O I：

10.1088/0953-8984/16/48/045

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We have measured the electrical resistance and the high-field magnetoresistance (MR) up to 30 T for nano-scale misfit layered compounds Ca3-xYxCo4O9 (x = 0, 0.1, 0.2). The resistance shows the characteristic behaviour proportional to exp(rootT(0)/T) of the variable range tunnelling at low temperatures. The negative MR ratio increases remarkably with decreasing temperature and with increasing x at temperatures below 20 K. We propose that the MR in the cobaltite can be explained by the magnetic tunnelling effect.

引用

页码：S5769 / S5772

页数：4

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