Crystal structure and superconductivity of rubidium tungsten bronzes RbxWO3 prepared by a hybrid microwave method

被引：21

作者：

Guo, Juan ^{[1
,2
,3
]}

Dong, Cheng ^{[2
,3
]}

Yang, Lihong ^{[2
,3
]}

Chen, Hong ^{[2
,3
]}

机构：

[1] Zhengzhou Univ, Sch Phys & Engn, Zhengzhou 450052, Henan, Peoples R China

[2] Chinese Acad Sci, Natl Lab Superconductiv, Inst Phys, Beijing 100080, Peoples R China

[3] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100080, Peoples R China

来源：

MATERIALS RESEARCH BULLETIN | 2008年 / 43卷 / 04期

基金：

中国国家自然科学基金;

关键词：

oxides; superconductors; chemical synthesis; crystal structure; electrical properties;

D O I：

10.1016/j.materresbull.2008.01.005

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The rubidium tungsten bronzes RbxWO3 have been prepared from Rb2CO3, WO3 and W powders using hybrid microwave method. The single hexagonal phase samples can be obtained as actual rubidium content x in the range of 0.21-0.33, and their lattice parameters a and c linearly drop and rise with the increase of rubidium content respectively. For samples with x = 0.14, 0.16, 0.18, the superconducting transition temperature T. from resistivity measurements does not change with the rubidium content, while T, from susceptibility measurements shows a decrease from 5.3 K for x = 0.14 to 4.8 K for x = 0.18. The charge density wave (CDW) transition appears in Rb0.21WO3, Rb0.23WO3 and Rb0.25WO3 at about 200-260 K. The CDW transition is most obvious in Rb0.23WO3 which shows the lowest degree of crystallization among the samples. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：779 / 786

页数：8

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