Normal-state electrical resistivity and superconducting magnetic penetration depth in Eu0.5K0.5Fe2As2

Details Normal-state electrical resistivity and superconducting magnetic penetration depth in Eu0.5K0.5Fe2As2 Normal-state electrical resistivity and superconducting magnetic penetration depth in Eu0.5K0.5Fe2As2

2009-02-12

arxiv.org/abs/0902.2190v1

Physics

Condensed Matter

Superconductivity

7 pages 4 figures

Scientific paper

We report measurements of the temperature dependence of the electrical resistivity, \rho(T), and magnetic penetration depth, \lambda(T), for polycrystalline samples of Eu_0.5K_0.5Fe_2As_2 with Tc=31 K. $\rho(T)$ follows a linear temperature dependence above T_c and bends over to a weaker temperature dependence around 150 K. The magnetic penetration depth, determined by radio frequency technique displays an unusual minimum around 4 K which is associated with short-range ordering of localized Eu3+ moments.

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