The influence of doping with Ca and Mg in YBa2Cu3O7-δ ceramic

被引：2
作者：
Attaf, S. [1 ]
Mosbah, M. F. [1 ]
Vecchione, A.
Fittipaldi, R.
机构：
[1] Univ Mentouri, Lab Couches Minces & Interfaces, Constantine 25017, Algeria
来源：
EMM-FM2011 - FIRST EURO MEDITERRANEAN MEETING ON FUNCTIONALIZED MATERIALS | 2012年 / 29卷
关键词：
SUPERCONDUCTING PROPERTIES; ZN SUBSTITUTION; NORMAL-STATE; SYSTEM; ANISOTROPY; CALCIUM; NI;
D O I：
10.1051/epjconf/20122900003
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have investigated the effect of partial substitution of Ca for Y and/or Mg for Cu on structural, compositional and magnetic properties in YBa2Cu3O7-delta polycrystalline compounds. All prepared samples were found to be single phase with small fraction of Ba-secondary phases. Substitution by more than 2% of magnesium causes an increase of spurious phases. Energy Dispersive Spectroscopy (EDS) revealed that the distribution of Ca in the sample is quite homogenous. DC susceptibility measurements show that superconducting transition temperature Tc is reduced much more by Ca than Mg. Hysteresis loops reveal that magnetic irreversibility is decreased by Ca and Mg content. The deduced critical current density Jc does not follow the same variation. Ca alone reduces Jc for x=0.1 and x=0.2. Together with Ca, Mg compensates the reduction of Jc and increasing its content near the solubility limit gives higher Jc than in the undoped sample.
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页数：10
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