Structural and electronic transport properties of NaxCoO2

被引：3

作者：

Cui, L. ^{[1
]}

Zhao, Y. G. ^{[1
]}

Zhang, G. M. ^{[1
]}

Zhang, W. Y. ^{[1
]}

Guo, Z. P. ^{[1
]}

Ren, W. ^{[1
]}

Zhang, X. P. ^{[1
]}

Zhu, M. H. ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2006年 / 426卷 / 1-2期

基金：

高等学校博士学科点专项科研基金; 中国国家自然科学基金;

关键词：

oxide materials; solid-state reactions; electrical transport;

D O I：

10.1016/j.jallcom.2006.03.091

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Structure and transport properties of the layered materials NaxCoO2 (0.48 <= x <= 0.76) have been investigated. With the increase of x, the in-plane lattice parameter a increases while the lattice parameter c decreases. The lattice parameter c of our samples is much smaller than that of the samples whose Na content was controlled by chemical de-intercalation from Na0.77CoO2 [Foo et al., Phys. Rev. Lett. 92 (2004) 247001]. The temperature dependence of electrical resistivity of NaxCoO2 shows that all the samples remain metallic and the resistivity reaches a minimum around x = 0.68. A jump in d rho/dT was observed at certain temperature, which depends on x. The difference of electrical transport property between NaxCoO2 prepared by solid-state reaction and NaxCoO2 obtained by chemical de-intercalation from Na0.77CoO2 was also discussed by considering the lattice parameter difference. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：72 / 75

页数：4

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