Flux pinning mechanisms in graphene-doped MgB2 superconductors

被引：37

作者：

De Silva, K. S. B. ^{[1
]}

Xu, X. ^{[1
]}

Gambhir, S. ^{[2
]}

Wang, X. L. ^{[1
]}

Li, W. X. ^{[1
]}

Wallace, G. G. ^{[2
]}

Dou, S. X. ^{[1
]}

机构：

[1] Univ Wollongong, Inst Superconducting & Elect Mat, Wollongong, NSW 2522, Australia

[2] Univ Wollongong, Intelligent Polymer Res Inst, Wollongong, NSW 2522, Australia

来源：

SCRIPTA MATERIALIA | 2011年 / 65卷 / 07期

基金：

澳大利亚研究理事会;

关键词：

Electrical resistivity/conductivity; Metallic superconductors; Magnetoresistance; Graphene doping;

D O I：

10.1016/j.scriptamat.2011.06.047

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effects of graphene doping on the superconducting properties of MgB2 were studied. We found that small addition of graphene significantly improves the superconducting properties of MgB2, with only a small reduction in T-c. Low resistivity, high critical fields and enhanced flux-flow activation energy were observed for the optimally doped bulk sample. The spatial fluctuation in the transition temperature (delta T-c pinning) is the flux pinning mechanism in graphene-doped MgB2. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：634 / 637

页数：4

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