Critical Current Density and Grain Connectivity of Bi-2223 added MgB2 Superconductor

被引：0
|
作者：
Tripathi, D. [1 ]
Dey, T. K. [1 ]
机构：
[1] Indian Inst Technol, Cryogen Engn Ctr, Thermophys Lab, Kharagpur 721302, W Bengal, India
来源：
SOLID STATE PHYSICS: PROCEEDINGS OF THE 58TH DAE SOLID STATE PHYSICS SYMPOSIUM 2013, PTS A & B | 2014年 / 1591卷
关键词：
MgB2; Bi-2223; Connectivity; Critical Current Density;
D O I：
10.1063/1.4873066
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Polycrystalline MgB2 with addition of 0, 1, 3, and 5 wt. % of Bi-2223(Bi1.8Pb0.26Sr2Ca2Cu3O10+x) powder has been synthesized by solid reaction process. The effect of Bi-2223 addition on current transport and superconducting properties of polycrystalline MgB2 superconductor is discussed. Four probe DC resistivity measurement shows that low level of Bi-2223 addition hardly affects the superconducting transition temperature, T-c of MgB2. The modified Bloch-Gruneisen (B-G) analysis of normal state resistivity data reveals a decrease in intergrain connectivity and increase in intragrain connectivity of MgB2 by Bi-2223 addition. The critical current density of present set of samples is estimated from M-H hysteresis loop in the light of Bean's model. MgB2 added with 1 wt. % of Bi-2223 added gives the best performance (similar to 2 times enhancement in J(c)) amongst the studied samples.
引用
收藏
页码：1654 / 1656
页数：3
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