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Improvement of Jc and Hc2 in MgB2 superconductor with citric acid addition

Journal Article


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Abstract


  • This paper reports on the fabrication and characterization of citric acid (CA)-C6H8O7 added MgB2 superconductor. The relationships between microstructures, critical current density (Jc), critical temperature (Tc), upper critical field (Hc2), irreversibility field (Hirr), and normal state resistivity for 10 wt% C6H8O7 added MgB2 samples sintered at temperatures from 650C to 950C were systematically studied. A reduction in Tc and in lattice parameter a due to the C substitution and possible oxygen (O) effects occurs wtih C6H8O7 addition. Jc, Hc2, and Hirr are significantly enhanced, however, with the addition of C6H8O7. All the samples exhibit Jc above 104 A/cm2 at 5 K and 8 T. This value is higher than for the un-doped MgB2 by a factor of 9. The significant improvement in the superconducting properties is attributed to the lattice distortion due to the C and possible oxygen (O) substitution for boron, with the C and O coming from the decomposition of C6H8O7.

Publication Date


  • 2008

Citation


  • Zeng, R., Lu, L., Wang, J., Li, W., Shi, D., Horvat, J. & Dou, S. Xue. (2008). Improvement of Jc and Hc2 in MgB2 superconductor with citric acid addition. In European Conference on Applied Superconductivity, 16-20 September, Brussels, Belgium. Journal of Physics: Conference Series, 97 012215-1-012215-6.

Scopus Eid


  • 2-s2.0-42149129414

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=5692&context=engpapers

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/2761

Has Global Citation Frequency


Start Page


  • 012215-1

End Page


  • 012215-6

Volume


  • 97

Place Of Publication


  • United Kingdom

Abstract


  • This paper reports on the fabrication and characterization of citric acid (CA)-C6H8O7 added MgB2 superconductor. The relationships between microstructures, critical current density (Jc), critical temperature (Tc), upper critical field (Hc2), irreversibility field (Hirr), and normal state resistivity for 10 wt% C6H8O7 added MgB2 samples sintered at temperatures from 650C to 950C were systematically studied. A reduction in Tc and in lattice parameter a due to the C substitution and possible oxygen (O) effects occurs wtih C6H8O7 addition. Jc, Hc2, and Hirr are significantly enhanced, however, with the addition of C6H8O7. All the samples exhibit Jc above 104 A/cm2 at 5 K and 8 T. This value is higher than for the un-doped MgB2 by a factor of 9. The significant improvement in the superconducting properties is attributed to the lattice distortion due to the C and possible oxygen (O) substitution for boron, with the C and O coming from the decomposition of C6H8O7.

Publication Date


  • 2008

Citation


  • Zeng, R., Lu, L., Wang, J., Li, W., Shi, D., Horvat, J. & Dou, S. Xue. (2008). Improvement of Jc and Hc2 in MgB2 superconductor with citric acid addition. In European Conference on Applied Superconductivity, 16-20 September, Brussels, Belgium. Journal of Physics: Conference Series, 97 012215-1-012215-6.

Scopus Eid


  • 2-s2.0-42149129414

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=5692&context=engpapers

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/2761

Has Global Citation Frequency


Start Page


  • 012215-1

End Page


  • 012215-6

Volume


  • 97

Place Of Publication


  • United Kingdom