Negative thermoelectric power induced by positive carriers in CaMn3-xCuxMn4O12

被引：19

作者：

Kobayashi, W ^{[1
]}

Terasaki, I

Mikami, M

Funahashi, RJ

机构：

[1] Waseda Univ, Dept Appl Phys, Tokyo 1698555, Japan

[2] Japan Sci & Technol Corp, CREST, Tokyo 1030027, Japan

[3] Natl Inst Adv Ind Sci & Technol, Ikeda, Osaka 5638577, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2004年 / 73卷 / 03期

关键词：

thermoelectric power; Heikes formula; transition-metal oxide; spin and orbital degeneracy;

D O I：

10.1143/JPSJ.73.523

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have found that the thermoelectric power of the ordered perovskite CaMn3-xCuxMn4O12 is negative at high temperature (-35 muV/K at 1000 K) although this material is a hole-doped conductor ill which Cu2+ is substituted for Mn3+. This is quantitatively explained by the extended Heikes formula, where entropy flows in a direction opposite to the charge.

引用

页码：523 / 525

页数：3

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