Phase formation and magnetotransport of alkali metal doped Na0.75CoO2 thermoelectric oxide

被引：3

作者：

Jood, P. ^{[1
]}

Peleckis, G. ^{[1
]}

Wang, X. L. ^{[1
]}

Dou, S. X. ^{[1
]}

Yamauchi, H. ^{[2
]}

Karppinen, M. ^{[2
]}

机构：

[1] Univ Wollongong, Inst Superconducting & Elect Mat, Wollongong, NSW 2519, Australia

[2] Helsinki Univ Technol, Inorgan & Analyt Chem Lab, FIN-02015 Helsinki, Finland

来源：

JOURNAL OF APPLIED PHYSICS | 2010年 / 107卷 / 09期

关键词：

LAYERED COBALTITE;

D O I：

10.1063/1.3365491

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Synthesis and characterization of bulk NaxCoO2 samples substituted by K and Rb is reported. Phase formation studies revealed a narrow stable region for Na-alkali metal-Co system. Whisker and platelike single crystalline structures have been found to form on the surface of the pellets in case of K doping. All samples were metallic and no characteristic anomaly in R-T curves was observed for Rb doped sample. Magnetoresistance measured has a pronounced positive response only for K-doped and pure NaxCoO2 phases, reaching 11% and 7% at 5 K temperature, respectively. (C) 2010 American Institute of Physics. [doi:10.1063/1.3365491]

引用

页数：3

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