Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10654466 | Solid State Communications | 2005 | 5 Pages |
Abstract
A series of polycrystalline samples of Mg1âxPbxB2 (0â¤xâ¤0.10) were prepared by a solid state reaction method and their structure, superconducting transition temperature and transport properties were investigated by means of X-ray diffraction (XRD) and resistivity measurements. Mg1âxPbxB2 compounds were shown to adopt an isostructural AlB2-type hexagonal structure in a relatively small range of lead concentration, xâ¤0.01. The crystalline lattice constants were evaluated and were found to exhibit slight length compression as x increases. The superconducting transition temperature (Tc) steadily decreases with Pb doping. It is suggested that the mechanism of superconductivity reduction by lead doping can be attributed to the chemical pressure effect.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
A. M'chirgui, F. Ben Azzouz, M. Annabi, M. Zouaoui, M. Ben Salem,