Study of selenium doped Bi-based superconductors by AES and SEM

Citation
Sa. Siddiqi et al., Study of selenium doped Bi-based superconductors by AES and SEM, MOD PHY L B, 15(22), 2001, pp. 973-980
Citations number
6
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
MODERN PHYSICS LETTERS B
ISSN journal
02179849 → ACNP
Volume
15
Issue
22
Year of publication
2001
Pages
973 - 980
Database
ISI
SICI code
0217-9849(20010920)15:22<973:SOSDBS>2.0.ZU;2-I
Abstract
Compositions in Bi2Sr2Ca2Cu3Oy:Se-x with x = 0, 0.05, 0.1, 0.2, 0.3, 0.4 ha ve been prepared by the solid state reaction method. The samples have initi ally been studied by the X-ray powder diffraction method for structural cha racterization. Superconducting transition temperatures (T) measured by the four probe technique shows dependence on selenium concentration. A detailed microstructural analysis has been carried out by scanning electron and Aug er electron spectroscopies in order to investigate the incorporation of sel enium in the grains of the superconductors. It is found that Se concentrati on affects both the T values and the morphology of the grains. AES studies clearly show the presence of selenium in the grains of the superconductor.