Ru $L_2$ edge X-ray resonant magnetic scattering from Ba(Fe$_{0.795}$Ru$_{0.205})_2$As$_2$ compound

ORAL

Abstract

We have investigated the magnetic polarization of the Ru 4$d$ dopant states in Ba(Fe$_{0.795}$Ru$_{0.205})_2$As$_2$ using Ru $L_2$ edge x-ray resonant magnetic scattering (XRMS). We observed a XRMS signal at Q $=$ (1/2, -1/2, 3), which is consistent with the magnetic propagation vector for the stripe AFM ordering found in the parent BaFe$_2$As$_2$ compound. We find that the temperature dependence of the XRMS signal follows closely the temperature dependence of the Fe order as determined by our previous neutron diffraction measurement. Our observations show evidence that the Ru 4$d$ states may be spin-polarized.

*The work at Lawrence Berkeley National Laboratory and Ames Laboratory was supported by the Office of Basic Energy Sciences, DMSE, US DOE, under Contract No. DE-AC02-05CH11231 and DE-AC02-07CH11358, respectively.

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Authors

  • Min Gyu Kim

    • Lawrence Berkeley National Laboratory

  • J. Soh

    • Ames Laboratory and Dept. of Physics and Astronomy, Iowa State University

  • J.C. Lang

    • Advanced Photon Source, Argonne National Laboratory

  • Y. Choi

    • Advanced Photon Source, Argonne National Laboratory

  • A. Thaler

    • Ames Laboratory and Dept. of Physics and Astronomy, Iowa State University

  • E. Bourret-Courchesne

    • Lawrence Berkeley National Laboratory

  • S.L. Bud'ko

    • Ames Laboratory and Dept. of Physics and Astronomy, Iowa State University

  • P.C. Canfield

    • Ames Laboratory and Dept. of Physics and Astronomy, Iowa State University

  • A. Kreyssig

    • Ames Laboratory and Dept. of Physics and Astronomy, Iowa State University

  • A.I. Goldman

    • Ames Laboratory and Dept. of Physics and Astronomy, Iowa State University

  • R.J. Birgeneau

    • Lawrence Berkeley National Laboratory