STUDY OF HALOGEN DOPING IN POLYCRYSTALLINE YBa2Cu3O7-$\delta$
ZHUANG RUI-FANG (庄瑞舫)a, XIE HUI (谢辉)a, JI HE-LIN (吉和林)b, JIN XIN (金新)b, QIN MENG-JUN (覃孟军)b, XU XIAO-NONG (徐小农)b, YAO XI-XIAN (姚希贤)b
a Institute of Coordination Chemistry, Nanjing University, Nanjing 210008, China; b Department of Physics, and State Key Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210008, China
Abstract This paper presents systematically the doping effects of halogens in YBa2Cu3O7-$\delta$ polycrystalline samples, with a series of concentrations of fluorine, chlorine, bromine or iodine. All samples were prepared by chemical method of citrate pyrolysis, which makes the halogen concentration in the samples more uniform. Samples doped with F have Tc as high as 94.5K, Cl, Br and I dopings also raise Tc to a certain extent. In addition, the influence of halogen doping on critical current density, morphology, constitution and so forth is discussed.
Received: 17 May 1993
Accepted manuscript online:
PACS:
74.62.Dh
(Effects of crystal defects, doping and substitution)
Fund: Project supported by the National Center for Research and Development on Superconductivity of China and the Doctoral Program Foundation of the State Education Commission of China.
Cite this article:
ZHUANG RUI-FANG (庄瑞舫), XIE HUI (谢辉), JI HE-LIN (吉和林), JIN XIN (金新), QIN MENG-JUN (覃孟军), XU XIAO-NONG (徐小农), YAO XI-XIAN (姚希贤) STUDY OF HALOGEN DOPING IN POLYCRYSTALLINE YBa2Cu3O7-$\delta$ 1994 Acta Physica Sinica (Overseas Edition) 3 589
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