Magnetic penetration depth and critical current density in aligned grains of NdFeAsO(F)

ORAL

Abstract

We have prepared a powder sample of NdFeAsOF, where most crystallite particles are aligned with their c-axis along a common direction. We have measured magnetic penetration depth and a critical current density in the basal-plane. The penetration depth shows a fully gapped superconducting state with two energy gaps, one roughly twice as large as the other. The in-plane critical current density is as high as several MA/cm$^{2}$ at low temperatures, zero field, which may be promising for applications.

*Research sponsored by the DOE Division of Materials Sciences and Engineering

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Authors

  • Yuri L. Zuev

    • Oak Ridge National Laboratory

  • E. D. Specht

    • Oak Ridge National Laboratory

  • D. K. Christen

    • Oak Ridge National Laboratory

  • J.R. Thompson

    • Dept. of Physics, University of Tennessee and Oak Ridge National Laboratory
    • Dept Physics, Univ. Tennessee, Knoxville, TN, USA
    • U. of Tennessee
    • Dept. of Physics, University of Tennessee, and Oak Ridge National Laboratory
    • University of Tennessee

  • R. Jin

    • Oak Ridge National Laboratory
    • Materials Science \& Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA

  • B. C. Sales

    • Oak Ridge National Laboratory

  • A. Sefat

    • Oak Ridge National Laboratory
    • Materials Science \& Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA

  • M. A. McGuire

    • Oak Ridge National Laboratory

  • D. G. Mandrus

    • Oak Ridge National Laboratory
    • Oak Ridge National Laboratory, University of Tennessee
    • Materials Science \& Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA