Superconductivity at 11.3 K induced by cobalt doping in CeOFeAs

J. Prakash; S. J. Singh; S. Patnaik; A. K. Ganguli

doi:10.1016/j.ssc.2008.11.028

Superconductivity at 11.3 K induced by cobalt doping in CeOFeAs

Superconductivity 2009-03-24 v1 Materials Science

Authors: J. Prakash , S. J. Singh , S. Patnaik , A. K. Ganguli

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Abstract

Pure phases of a new oxyarsenide superconductor of the nominal composition CeOFe0.9Co0.1As was successfully synthesized by solid state reaction in sealed silica ampoules at 1180 C. It crystallizes in the layered tetragonal ZrCuSiAs type structure (sp gp P4/nmm) with lattice parameter of a = 3.9918(5) angstrom and c = 8.603(1) angstrom. A sharp superconducting transition is observed at 11.31 K with an upper critical field of 45.22 T at ambient pressure. The superconducting transition temperature is drastically lowered (~ 4.5, 4.9 K) on increasing the concentration (x = 0.15, 0.2) of cobalt.

Keywords

high-temperature superconductivity single crystal superconductivity superconductivity

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@article{arxiv.0810.1364,
  title  = {Superconductivity at 11.3 K induced by cobalt doping in CeOFeAs},
  author = {J. Prakash and S. J. Singh and S. Patnaik and A. K. Ganguli},
  journal= {arXiv preprint arXiv:0810.1364},
  year   = {2009}
}

Superconductivity at 11.3 K induced by cobalt doping in CeOFeAs

Abstract

Keywords

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