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Superconductivity in Layered CeO0.5F0.5BiS2

  • Rajveer Jha
  • V. P. S. Awana
Letter

Abstract

We report appearance of superconductivity in CeO0.5F0.5BiS2. The bulk polycrystalline samples CeOBiS2 and CeO0.5F0.5BiS2 are synthesized by conventional solid state reaction route via vacuum encapsulation technique. Detailed structural analysis showed that the studied CeO0.5F0.5BiS2 compound is crystallized in tetragonal P4/nmm space group with lattice parameters a=4.016(3) Å, c=13.604(2) Å. DC magnetization measurement (MT-curve) shows the ferromagnetic signal at the low temperature region. The superconductivity is established in CeO0.5F0.5BiS2 at \(T_{c}^{\mathrm{onset}}=2.5~\mbox{K}\) by electrical transport measurement. Under applied magnetic field, both T c onset and T c (ρ=0) decrease to lower temperatures and an upper critical field [H c2(0)] above 1.2 Tesla is estimated. The results suggest coexistence of ferromagnetism and superconductivity for the CeO0.5F0.5BiS2 sample.

Keywords

BiS2 based new superconductor Structure Ferromagnetic and transport properties 

Notes

Acknowledgements

The authors are grateful for the encouragement and support from Director NPL for this work. Rajveer Jha would like to thank the CSIR for providing the SRF scholarship to pursue his Ph.D. This work is also financially supported by DAE-SRC outstanding investigator award scheme on search for new superconductors.

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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  1. 1.Quantum Phenomena and Application DivisionNational Physical Laboratory (CSIR)New DelhiIndia

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