The effect of citric and oxalic acid doping on the superconducting properties of MgB₂
- Ojha, N. Department of Physics, Indian Institute of Technology Roorkee, India
- Malik, Vivek Kumar Department of Physics and Fribourg Centre for Nanomaterials-FriMat, University of Fribourg, Switzerland
- Singla, Rashmi Department of Physics, Indian Institute of Technology Roorkee, India
- Bernhard, Christian Department of Physics and Fribourg Centre for Nanomaterials-FriMat, University of Fribourg, Switzerland
- Varma, G. D. Department of Physics, Indian Institute of Technology Roorkee, India
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23.10.2009
Published in:
- Superconductor Science and Technology. - 2009, vol. 22, no. 12, p. 125014
English
In this paper we report the effect of carbon doping on the structural and superconducting properties of MgB₂ using citric and oxalic acids as carbon sources. The bulk polycrystalline samples have been synthesized via a standard solid state reaction route with composition MgB₂+x wt% of citric and oxalic acids (x = 0, 5 and 10). The x-ray diffraction results reveal the formation of dominantly MgB₂ with only a small amount of impurity phase MgO and substitution of C at the B site of MgB₂ for both dopants. Improvements in the upper critical field (HC2), irreversibility field (Hirr) and high field (>2.5 T) critical current density (JC) have been observed on C doping in the samples. The correlations between superconducting properties and structural characteristics of the samples are described and discussed in this paper.
- Faculty
- Faculté des sciences et de médecine
- Department
- Département de Physique
- Language
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- English
- Classification
- Physics
- License
- License undefined
- Identifiers
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- RERO DOC 17065
- DOI 10.1088/0953-2048/22/12/125014
- Persistent URL
- https://folia.unifr.ch/unifr/documents/301446
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