Irreversibility line of the MgB$_{2}$ superconductor

Y. Z. Zhang; R. Deltour; H. H. Wen; J. F. de Marneffe; H. Chen; S. F. Wang; S. Y. Dai; Y. L. Zhou; Q. Li; A. G. M. Jansen; P. Wyder; Z. X. Zhao

Irreversibility line of the MgB$_{2}$ superconductor

Superconductivity 2007-05-23 v4

Authors: Y. Z. Zhang , R. Deltour , H. H. Wen , J. F. de Marneffe , H. Chen , S. F. Wang , S. Y. Dai , Y. L. Zhou , Q. Li , A. G. M. Jansen , P. Wyder , Z. X. Zhao

View on arXiv ↗ PDF ↗

Abstract

Magneto-resistivity of a c-axis oriented MgB $_{2}$ thin film was studied in perpendicular and parallel magnetic fields up to $\sim$ 23 T with temperatures down to 0.38 K. Resistive critical magnetic fields were determined. Large separations between irreversibility lines and upper critical magnetic fields are observed. An effective quantum parameter as a function of temperature is proposed to explain the separations under the theoretical framework of quantum fluctuations, in good agreement with our experimental and previously published experimental data.

Keywords

irreversibility line MgB$_2$ superconductor magneto-resistivity upper critical field quantum fluctuations thin film

Cite

@article{arxiv.cond-mat/0110312,
  title  = {Irreversibility line of the MgB$_{2}$ superconductor},
  author = {Y. Z. Zhang and R. Deltour and H. H. Wen and J. F. de Marneffe and H. Chen and S. F. Wang and S. Y. Dai and Y. L. Zhou and Q. Li and A. G. M. Jansen and P. Wyder and Z. X. Zhao},
  journal= {arXiv preprint arXiv:cond-mat/0110312},
  year   = {2007}
}

Comments

: 11 pages, revtex4, 4 figs embedded

Irreversibility line of the MgB$_{2}$ superconductor

Abstract

Keywords

Cite

Comments

Related papers