Striking Zn impurity effect on the Fe-based superconductor BaFe1.87Co0.13As2

J. J. Li; Y. F. Guo; S. B. Zhang; S. Yu; Y. Tsujimoto; K. Yamaura; E. Takayama-Muromachi

doi:10.1016/j.physc.2011.01.002

Striking Zn impurity effect on the Fe-based superconductor BaFe1.87Co0.13As2

Superconductivity 2011-02-16 v1 Strongly Correlated Electrons

Authors: J. J. Li , Y. F. Guo , S. B. Zhang , S. Yu , Y. Tsujimoto , K. Yamaura , E. Takayama-Muromachi

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Abstract

Nonmagnetic impurity effect was studied on the n-type Fe-based superconductor BaFe1.87Co0.13As2 (Tc = 25 K) by a successful Zn substitution for Fe up to 7 at.%. Magnetic susceptibility, electrical resistivity, specific heat, and Hall coefficient measurements indicated that Tc linearly decreases with the Zn concentration and disappears at 7 at.%. The result is quantitatively comparable with what was observed for YBCO, while it disagrees with a recent report for the p-type Ba0.5K0.5Fe2As2. Fragile SC against a nonmagnetic impurity was first confirmed for the n-type 122 Fe-based superconductor.

Keywords

high-temperature superconductivity

Cite

@article{arxiv.1011.0225,
  title  = {Striking Zn impurity effect on the Fe-based superconductor BaFe1.87Co0.13As2},
  author = {J. J. Li and Y. F. Guo and S. B. Zhang and S. Yu and Y. Tsujimoto and K. Yamaura and E. Takayama-Muromachi},
  journal= {arXiv preprint arXiv:1011.0225},
  year   = {2011}
}

Comments

14 pages, 5 figures

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