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Improvement of the High-Magnetic-Field Critical Current Density of the Ex-Situ Annealed MgB2 Thick Films by Oxygen Doping

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Abstract

This paper presents a very simple way to synthesis MgB2 thick films with high critical current density in a magnetic field by ex-situ annealing precursor B films in air with excessive Mg in a sealed quartz tube. The films show a significant improvement of critical current density in a magnetic field compared to the high purity films annealed in vacuum, while its zero-resistance transition temperature T c zero and normal state resistivity still maintain about 38 K and 17 μΩcm. The results demonstrate MgB2 thick films have great potential applications in superconducting coated conductors.

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Authors and Affiliations

  1. The College of Physics Science and Technology, Hebei University, 071002, Baoding, China

    Shufang Wang, Wei Yu & Guangsheng Fu

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  1. Shufang Wang
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  2. Wei Yu
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  3. Guangsheng Fu
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Correspondence to Shufang Wang.

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Wang, S., Yu, W. & Fu, G. Improvement of the High-Magnetic-Field Critical Current Density of the Ex-Situ Annealed MgB2 Thick Films by Oxygen Doping. J Supercond Nov Magn 21, 427–430 (2008). https://doi.org/10.1007/s10948-008-0353-9

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  • DOI: https://doi.org/10.1007/s10948-008-0353-9

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