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Correlation between doping induced disorder and superconducting properties in carbohydrate doped MgB2

Journal Article


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Abstract


  • A comprehensive study of the effects of carbohydrate doping on the superconductivity of MgB2 has been conducted. In accordance with the dual reaction model, more carbon substitution is achieved at lower sintering temperature. As the sintering temperature is lowered, lattice disorder is increased. Disorder is an important factor determining the transition temperature for the samples studied in this work, as evidenced from the correlations among the lattice strain, the resistivity, and the transition temperature. It is further shown that the increased critical current density in the high field region can be understood by a recently-proposed percolation model [M. Eisterer et al., Phys. Rev. Lett. 90, 247002 (2003)]. For the critical current density analysis, the upper critical field is estimated from a correlation that was reported in a recent review article [M. Eisterer, Supercond. Sci. Technol. 20, R47 (2007)], where a sharp increase in the upper critical field by doping is mainly due to an increase in lattice disorder or impurity scattering. On the other hand, it is shown that the observed reduction in self-field critical current density is related to the reduction in the pinning force density by carbohydrate doping.

UOW Authors


  •   Kim, Jung Ho
  •   Dou, Shi
  •   Oh, Sangjun (external author)
  •   Jercinovic, M (external author)
  •   Babic, E (external author)
  •   Nakane, T (external author)
  •   Kumakura, Hiroaki (external author)

Publication Date


  • 2008

Citation


  • Kim, J., Dou, S. Xue., Oh, S., Jercinovic, M., Babic, E., Nakane, T. & Kumakura, H. (2008). Correlation between doping induced disorder and superconducting properties in carbohydrate doped MgB2. Journal of Applied Physics, 104 (6), 063911-1-063911-5.

Scopus Eid


  • 2-s2.0-54749121341

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1110&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/111

Has Global Citation Frequency


Start Page


  • 063911-1

End Page


  • 063911-5

Volume


  • 104

Issue


  • 6

Abstract


  • A comprehensive study of the effects of carbohydrate doping on the superconductivity of MgB2 has been conducted. In accordance with the dual reaction model, more carbon substitution is achieved at lower sintering temperature. As the sintering temperature is lowered, lattice disorder is increased. Disorder is an important factor determining the transition temperature for the samples studied in this work, as evidenced from the correlations among the lattice strain, the resistivity, and the transition temperature. It is further shown that the increased critical current density in the high field region can be understood by a recently-proposed percolation model [M. Eisterer et al., Phys. Rev. Lett. 90, 247002 (2003)]. For the critical current density analysis, the upper critical field is estimated from a correlation that was reported in a recent review article [M. Eisterer, Supercond. Sci. Technol. 20, R47 (2007)], where a sharp increase in the upper critical field by doping is mainly due to an increase in lattice disorder or impurity scattering. On the other hand, it is shown that the observed reduction in self-field critical current density is related to the reduction in the pinning force density by carbohydrate doping.

UOW Authors


  •   Kim, Jung Ho
  •   Dou, Shi
  •   Oh, Sangjun (external author)
  •   Jercinovic, M (external author)
  •   Babic, E (external author)
  •   Nakane, T (external author)
  •   Kumakura, Hiroaki (external author)

Publication Date


  • 2008

Citation


  • Kim, J., Dou, S. Xue., Oh, S., Jercinovic, M., Babic, E., Nakane, T. & Kumakura, H. (2008). Correlation between doping induced disorder and superconducting properties in carbohydrate doped MgB2. Journal of Applied Physics, 104 (6), 063911-1-063911-5.

Scopus Eid


  • 2-s2.0-54749121341

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1110&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/111

Has Global Citation Frequency


Start Page


  • 063911-1

End Page


  • 063911-5

Volume


  • 104

Issue


  • 6