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脉冲磁场处理对碳纳米管掺杂MgB₂线材临界电流密度的影响

Effect of pulsed magnetic field on critical current in carbon-nanotube-doped MgB₂ wires

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【Author】 Chen Rong-Hua 1) Zhu Ming-Yuan 1) Li Ying 1) Li Wen-Xian 1) Jin Hong-Ming 1) Dou Shi-Xue 2) 1)(Department of Materials Science and Engineering,Shanghai University,Shanghai 200072,China)2)(Institute for Superconducting and Electronic Materials,University of Wollongong,Northfields Ave. Wollongong,NSW 2522 Australia)

【机构】上海大学材料科学与工程学院；伍伦贡大学电子材料与超导研究所上海200072；上海200072；伍伦贡2522；澳大利亚；

【摘要】对碳纳米管(CNT)掺杂MgB2超导体磁场处理后的行为进行了研究.结果表明,CNT掺杂MgB2超导体经5T脉冲磁场处理后临界电流密度Jc(H)在低磁场下提高了2—3倍,高场下提高一个数量级以上,扫描电镜结果显示CNT沿着处理磁场方向规则排列并且成为MgB2基体的形核中心和高效的磁通钉扎中心.更多还原

【Abstract】 This study is about carbon_nanotube （CNT）_doping of MgB₂ superconductor processed under the magnetic field. The J_c（H） for CNT doped sample increased by a factor of 2—3 in low filed and more than an order of magnitude in high field after processing in magnetic field. The alignment of CNT along the processing field direction was observed by SEM.更多还原