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Effect of Mg and C contents in MgCNi3, and structure and superconductivity of MgCNi3-x -Co x

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Abstract

The effect of Mg and C contents on TC in MgCN3, and structure and superconductivity of MgCNi3-x Co x were studied. It is found that the excess of Mg and C in initial material mixture is favorable to improvement inT c and helps to obtain single-phase samples. For preparing MgCNi3 superconductor, the optimum composition of starting materials is MgC1.45Ni3 with excess of Mg (20 wt.%) of the stoichiometric composition. In gCNi3-x Co x system, a continuous solid solution is formed, lattice parameter decreases slightly andT c decreases obviously with increasingx. A suppression of superconductivity is observed due to the substitution of Co (Mn) for Ni. The suppression effect is smaller for the substitution of Co than that of Mn

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References

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Authors and Affiliations

  1. National Laboratory for Superconductivity, Institute of Physics, Chinese Academy of Sciences, 100080, Beijing, China

    Zhi’an Ren, Guangcan Che, Shunlian Jia, Hong Chen, Yongming Ni & Zhongxian Zhao

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  1. Zhi’an Ren
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  2. Guangcan Che
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  3. Shunlian Jia
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  4. Hong Chen
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  5. Yongming Ni
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  6. Zhongxian Zhao
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Correspondence to Zhi’an Ren.

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Ren, Z., Che, G., Jia, S. et al. Effect of Mg and C contents in MgCNi3, and structure and superconductivity of MgCNi3-x -Co x . Sci. China Ser. A-Math. 44, 1205–1208 (2001). https://doi.org/10.1007/BF02877440

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  • DOI: https://doi.org/10.1007/BF02877440

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