Thermopower of giant magnetoresistive oxide system La1-xCuxMnO3 (0.1<=x<=0.4)

被引：18

作者：

Mahendiran, R

Tiwary, SK

Raychaudhuri, AK

机构：

[1] Department of Physics, Indian Institute of Science

来源：

SOLID STATE COMMUNICATIONS | 1996年 / 98卷 / 08期

关键词：

thermopower; giant magnetoresistance; perovskite oxides;

D O I：

10.1016/0038-1098(96)00102-0

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The thermopower (Seebeck coefficient, S) of the perovskite oxide system La1-xCaxMnO3 for compositions 0.1 less than or equal to x less than or equal to 0.4 has been measured for 4.5 K less than or equal to T less than or equal to 360 K. The observed S is rather complex and points to a number of processes occuring in these materials. We suggest a scheme to analyze the data. S depends on the Mn4+ content and shows a systematic change to more negative value as x (i.e, Mn4+ content) increases. A large negative peak in S at around 25 K has been observed suggesting the existance of a strong inelastic scattering mechanism hitherto not seen in this material.

引用

页码：701 / 704

页数：4

共 17 条

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