Crystal structure of superconducting BaPb0.7Bi0.15Sb0.15O3

被引：1

作者：

Fu, WT ^{[1
]}

Ijdo, DJW ^{[1
]}

机构：

[1] Leiden Univ, Gorlaeus Labs, Leiden Inst Chem, NL-2300 RA Leiden, Netherlands

来源：

SOLID STATE COMMUNICATIONS | 2001年 / 118卷 / 06期

关键词：

superconductors; chemical synthesis; crystal structure and symmetry;

D O I：

10.1016/S0038-1098(01)00116-8

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Neutron powder diffraction data have been used to investigate the structure of superconducting BaPb0.7Bi0.15Sb0.15O3 (T-c = 5.3 K). The Rietveld profile refinement has shown that it is tetragonal, space group I4/mcm, with the lattice parameters of a = 6.0405(1) Angstrom and c = 8.5812(3) Angstrom. BaPb0.7Bi0.15Sb0.15O3 consists, thus, of disordered arrangement of ph, Bi and Sb atoms with the averaged (Pb,Bi,Sb)-O distance of 2.155 Angstrom. Its structure can be viewed as distortion of the ideal cubic perovskite by the cooperative tilt of (Pb,Bi,Sb)O-6 octahedra along the primitive [001](p) axis (similar to6.7 degrees), as was previously observed for the superconducting phase in the BaPb1-xBixO3 system. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：291 / 294

页数：4

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