Journal article

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
Department
Physique
Language
  • English
Classification
Physics
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Persistent URL
https://folia.unifr.ch/unifr/documents/301446
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