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.

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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