|
|||||
|
|
Structural and transport properties of the triple-layer compounds Ba4(Pb1−xBix)3O10 (0≤ x<0.3) |
|
| Authors: | W. T. Fu H. W. Zandbergen Q. Xu J. M. van Ruitenbeek L. J. de Jongh G. van Tendeloo |
| Affiliation: | a Kamerlingh Onnes Laboratory Leiden University, P.O. Box 9506, 2300 RA, Leiden, The Netherlands b Gorlaeus Laboratories Leiden University, P.O. Box 9506, 2300 RA, Leiden, The Netherlands c National Center for HREM, Laboratory for Material Sciences Rotterdamseweg 137, 2628 AL, Delft, The Netherlands d Center for Electron Microscopy, University of Antwerp - RUCA Groenenborgerlaan 171, Antwerp, Belgium |
| Abstract: | A series of new compounds Ba4(Pb1−xBix)3O10 with 0≤x<0.3 has been prepared and characterized by X-ray and electron diffraction. The d.c. resistivity vs. temperature data for different x values are presented and structural features are compared to those of the superconducting phase Ba(Pb1−xBix)O3. The “mother-compound” Ba4Pb3O10 is tetragonal, with lattice constants A=0.4280(1) and C=3.017(1) nm. Its structure can be regarded as a stacking of Ba(PbBi)O3 triple-layers, separated by single BaO layers. Electron diffraction reveals the presence of a weak superstructure with the a-axis related to that of the perovskite by a=√2ap. Frequent intergrowth of this phase with the perovskite structure is observed. The conductivity of the samples Ba4Pb3O10 is nearly independent of temperature, while Bi-doped samples exhibit semiconductor-like behaviour at low temperature. No superconducting transition is observed down to 2K. |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ | |