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arXiv · 1011.0225

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
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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.

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J. J. Li, Y. F. Guo, S. B. Zhang, S. Yu, Y. Tsujimoto, K. Yamaura, E. Takayama-Muromachi. 2010-11-01. Striking Zn impurity effect on the Fe-based superconductor BaFe1.87Co0.13As2. https://doi.org/10.1016/j.physc.2011.01.002

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