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

页码：1654 / 1656

页数：3

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