Open AccessBARIUM-DOPING EFFECTS ON THE SUPERCONDUCTIVITY OF Bi2Sr2CaCu2Oy
Author(s) -
Yang Bei-fang,
M. J. G. Lee,
J. M. Perz,
Xu Cun-Yi,
JianMin Zuo,
Liangbin Wang,
Yang Ruan,
Yuheng Zhang
Publication year - 1994
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.43.308
Subject(s) - barium , superconductivity , doping , materials science , crystallite , phase (matter) , condensed matter physics , transition temperature , superconducting transition temperature , analytical chemistry (journal) , chemistry , physics , optoelectronics , metallurgy , organic chemistry , chromatography
Ba-doping effects on the superconducting properties in the Bi2Sr2-xBaxCaCu2Oy single crystals (0≤x≤0.15) and polycrystalline samples (0≤x≤0.3) have been studied. The results show that Ba enters the superconducting phase with a solubi-lity limit. For 2212 phase single crystals, the length of c-axis and the supercondu-cting transition temperature Tc both increase with increasing Ba content. For slowly cooled sintered samples, Tc is significantly increased by Ba doping, whereas for quenched samples Tc is little affected. Changes in Tc with Ba doping have been explained by changes in the hole concentration.