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Effect of annealing on superconductivity in Fe1+y (Te1−x S x ) system

  • Research Paper
  • Recent Development of Iron Pnictide Superconductors
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Abstract

We have synthesized polycrystalline samples of Fe1.11(Te1−x S x ) and single crystals of Fe1+y (Te0.88S0.12), and characterized their properties. Our results show that the solid solution of S in the Fe1.11Te tetragonal lattice is limited, ∼10%. We observed superconductivity at ∼8 K in both polycrystalline samples and single crystals. Magnetization measurements reveal that the volume fraction is small for this superconducting phase in both polycrystalline samples as-synthesized and single crystals as-grown. It is found that annealing in air enhances the superconducting fraction; the maximum fraction is almost 100% in the single crystals annealed in air at 300°C. We discuss the effect of annealing on superconductivity and transport properties at the normal state in the Fe1+y (Te1−x S x ) system in terms of decrease of the excess Fe.

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Authors and Affiliations

  1. Department of Physics, Zhejiang University, Hangzhou, 310027, China

    ChiHeng Dong, HangDong Wang, JinHu Yang, Jian Chen, ZuJuan Li, HuiQiu Yuan & MingHu Fang

  2. Department of Physics, Changshu Institute of Technology, Changshu, 215500, China

    Bin Qian

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  1. ChiHeng Dong
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  2. HangDong Wang
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  3. JinHu Yang
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  4. Bin Qian
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  5. Jian Chen
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  6. ZuJuan Li
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  7. HuiQiu Yuan
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  8. MingHu Fang
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Correspondence to MingHu Fang.

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Dong, C., Wang, H., Yang, J. et al. Effect of annealing on superconductivity in Fe1+y (Te1−x S x ) system. Sci. China Phys. Mech. Astron. 53, 1216–1220 (2010). https://doi.org/10.1007/s11433-010-4008-z

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  • DOI: https://doi.org/10.1007/s11433-010-4008-z

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