X-ray magnetic circular dichroism spectroscopy investigation of ferromagnetic ordering in NdCoAsO

ORAL

Abstract

Recently, the electronic properties of RMOAs (R= rare earth, M = transition metal such as Fe or Co) type 3d-transition metal based layered oxypnictides have attracted considerable interest, in view of the discovery of superconductivity in the FeAs compounds. Here, we would like to present the results of ferromagnetic ordering, element specific magnetic moments of Nd and Co in NdCoAsO, obtained by x-ray magnetic circular dichroism spectroscopy at Nd and Co sites. The nature of magnetic coupling between Co and Nd and its temperature dependence in relation to the bulk magnetization will be discussed.

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Authors

  • Vemuru Krishnamurthy

    University of Tennessee, Martin, Ripley Center, Ripley, Tennessee

  • Dave Keavney

    Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois

  • Michael McGuire

    Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, Oak Ridge National Laboratory, Oak Ridge, Tennessee, Oak Ridge National Laboratory - MSTD, Oak Ridge National Laboratory

  • Brian Sales

    Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, ORNL, Oak Ridge National Laboratory, Oak Ridge, Tennessee, Oak Ridge National Laboratory, Oak Ridge National Laboratory - MSTD

  • Athena Sefat

    Oak Ridge National Laboratory, Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, Oak Ridge National Laboratory, Oak Ridge, Tennessee

  • David Mandrus

    Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, ORNL, Oak Ridge National Laboratory, Oak Ridge, Tennessee, Oak Ridge National Laboratory - MSTD, Oak Ridge National Laboratory