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Enhanced critical current density in MgB2 superconductor via Si and C coadditions.


Citation

Tan, K.Y. and Tan, K.L. and Tan, K.B. and Lim, Kean Pah and Chen, Soo Kien and Shaari, Abdul Halim (2011) Enhanced critical current density in MgB2 superconductor via Si and C coadditions. Journal of Superconductivity and Novel Magnetism , 24 (6). pp. 2025-2029. ISSN 1557-1939; ESSN:1557-1947

Abstract

In this study, nanosize Silicon and Carbon (Si+C) were reacted with MgB2 in order to enhance the critical current density. The polycrystalline bulks were synthesized by the direct in situ reaction method and their phase formation, crystal structure, and superconducting properties were evaluated. The enhanced relative peak intensity of Mg2Si and MgB4 indicates the formation of a large volume fraction of these two phases with increasing (Si+C) additions. The a-axis lattice parameter shrinks significantly while c-axis increases slightly. The estimated C doping level at B site increases, leading to a degradation of the superconducting transition temperature with increasing (Si+C) additions. By a reaction with (Si+C), the field dependence of critical current density is shown to enhance at both 5 K and 20 K.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Science
DOI Number: https://doi.org/10.1007/s10948-011-1162-0
Publisher: Springer Verlag
Keywords: MgB2; Carbon doping; Critical current density.
Depositing User: Nur Farahin Ramli
Date Deposited: 20 Aug 2013 01:41
Last Modified: 12 Jan 2016 01:53
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1007/s10948-011-1162-0
URI: http://psasir.upm.edu.my/id/eprint/24931
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