Colossal thermoelectric power in Gd-Sr manganites

被引：34

作者：

Sagar, S. ^{[1
,2
]}

Ganesan, V. ^{[3
]}

Joy, P. A. ^{[4
]}

Thomas, Senoy ^{[5
]}

Liebig, A. ^{[5
]}

Albrecht, M. ^{[5
]}

Anantharaman, M. R. ^{[1
]}

机构：

[1] Cochin Univ Sci & Technol, Dept Phys, Cochin 22, Kerala, India

[2] Govt Polytech Coll Adoor, Dept Phys, Pathanamthitta, Kerala, India

[3] UGC DAE Consortium Sci Res, Low Temp Div, Indore, Madhya Pradesh, India

[4] Natl Chem Lab, Phys & Mat Chem Div, Pune 411008, Maharashtra, India

[5] Tech Univ Chemnitz, Inst Phys, D-09107 Chemnitz, Germany

来源：

EPL | 2010年 / 91卷 / 01期

关键词：

SEEBECK COEFFICIENT; THERMOPOWER; NANOWIRES;

D O I：

10.1209/0295-5075/91/17008

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Manganites belonging to the series Gd1-xSrxMnO3 (x=0.3, 0.4 and 0.5) were prepared by wet solid-state reaction and their thermoelectric power was evaluated. Thermoelectric power measurements revealed a peak value at similar to 40 K. All the samples exhibited a colossal thermopower at similar to 40K and in that Gd0.5Sr0.5MnO3 exhibited a maximum value of similar to 35 V/K, which is the largest reported for these class of materials at this temperature. Temperature-dependent magnetisation measurements showed that the samples exhibit a phase transition from paramagnetic to spin-glass-like state at these temperatures. Plausible mechanisms responsible for the observed colossal thermoelectric power in Gd-Sr manganites are discussed. Copyright (C) EPLA, 2010

引用

页数：4

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