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Phenomenological Theory of Superconductivity and Magnetism in Ho$_{1-x}$Dy$_x$Ni$_2$B$_2$C

Authors
  • Doh, Hyeonjin
  • Sigrist, Manfred
  • Cho, B. K.
  • Lee, Sung-Ik
Type
Preprint
Publication Date
Oct 14, 1999
Submission Date
Oct 14, 1999
Identifiers
DOI: 10.1103/PhysRevLett.83.5350
arXiv ID: cond-mat/9910214
Source
arXiv
License
Unknown
External links

Abstract

The coexistence of the superconductivity and magnetism in the Ho$_{1-x}$Dy$_x$Ni$_2$B$_2$C is studied by using Ginzburg-Landau theory. This alloy shows the coexistence and complex interplay of superconducting and magnetic order. We propose a phenomenological model which includes two magnetic and two superconducting order parameters accounting for the multi-band structure of this material. We describe phenomenologically the magnetic fluctuations and order and demonstrate that they lead to anomalous behavior of the upper critical field. The doping dependence of $T_c$ in Ho$_{1-x}$Dy$_x$Ni$_2$B$_2$C showing a reentrance behavior are analyzed yielding a very good agreement with experimental data.

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