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Synthesis and Superconductivity of New BiS2 Based Superconductor PrO0.5F0.5BiS2

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Abstract

We report synthesis and superconductivity at 3.7 K in PrO0.5F0.5BiS2. The newly discovered material belongs to the layered sulfide based REO0.5F0.5BiS2 compounds having a ZrCuSiAs-type structure. The bulk polycrystalline compound is synthesized by the vacuum encapsulation technique at 780 ∘C in a single step. Detailed structural analysis has shown that the as synthesized PrO0.5F0.5BiS2 is crystallized in a tetragonal P4/nmm space group with lattice parameters a=4.015(5) Å, c=13.362(4) Å. Bulk superconductivity is observed in PrO0.5F0.5BiS2 below 4 K from magnetic and transport measurements. Electrical transport measurements showed superconducting transition temperature (T c ) onset at 3.7 K and T c (ρ=0) at 3.1 K. The hump at T c related to the superconducting transition is not observed in the heat capacity measurement and rather a Schottky-type anomaly is observed at below ∼6 K. The compound is slightly semiconducting in a normal state. Isothermal magnetization (MH) exhibited typical type II behavior with a lower critical field (H c1) of around 8 Oe.

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Authors and Affiliations

  1. Quantum Phenomena and Applications Division, National Physical Laboratory (CSIR), Dr. K.S. Krishnan Marg, New Delhi, 110012, India

    Rajveer Jha, Anuj Kumar, Shiva Kumar Singh & V. P. S. Awana

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  1. Rajveer Jha
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  2. Anuj Kumar
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  3. Shiva Kumar Singh
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  4. V. P. S. Awana
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Correspondence to V. P. S. Awana.

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Jha, R., Kumar, A., Kumar Singh, S. et al. Synthesis and Superconductivity of New BiS2 Based Superconductor PrO0.5F0.5BiS2 . J Supercond Nov Magn 26, 499–502 (2013). https://doi.org/10.1007/s10948-012-2097-9

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  • DOI: https://doi.org/10.1007/s10948-012-2097-9

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