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26 April 2024

» arxiv » 1011.0225

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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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Date:	1 Nov 2010
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.
Source:	arXiv, 1011.0225
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