Scattering studies of the nature of long-range magnetic order coexisting with superconductivity in single-crystal RbEuFe<sub>4</sub>As<sub>4</sub>

ORAL

Abstract

We present magnetic long-range order studied by x-ray scattering and magnetic neutron diffraction (MND) on a single crystal RbEuFe4As4 (RbEu1144) suerpconductor. In tetragonal RbEu1144 superconductivity (SC) appears at ~37 K followed by an antiferromagnetic (AFM) transition at TN ~15 K. Our diffraction studies revealed a long-range, fully coherent, and 3D ordered magnetic phase characterized by a single wavevector, q=(0,0,1/4), which indicates a 4-unit-cell magnetic periodicity along the 4-fold c axis. High-resolution x-ray scattering did not find any detectable structural distortions (e.g. orthorhombic) at low temperatures. Element-selective x-ray resonant scattering (XRS) and MND measurements indicated a helical magnetic order of full Eu2+ moments locked into the ab plane, without the presence of any ferromagnetism (FM). The use of charge-magnetic interference phenomena in XRS for measuring hysteresis and determining trapped magnetic field value is presented.

*Advanced Photon Source and High Flux Isotope Reactor are DOE Office of Science User Facilities operated by Argonne National Laboratory (ANL) and Oak Ridge National Laboratory, respectively The work at Materials Science Division, ANL, was supported by the DOE, Office of Science, Materials Sciences and Engineering Division.

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Presenters

  • Zahirul Islam

    • Argonne National Laboratory
    • APS synchrotron, Argonne National Laboratory
    • Advanced Photon Source, Argonne National Laboratory
    • Physics, Argonne National Laboratory
    • Argonne Natl Lab

Authors

  • Zahirul Islam

    • Argonne National Laboratory
    • APS synchrotron, Argonne National Laboratory
    • Advanced Photon Source, Argonne National Laboratory
    • Physics, Argonne National Laboratory
    • Argonne Natl Lab

  • Omar Chmaissem

    • Physics, Northern Illinois University
    • Physics (NIU) and Material Science Division (ANL), Northern Illinois University and Argonne National Lab
    • Materials Science Division, Argonne National Lab
    • Northern Illinois University
    • Northern Illinois Univ

  • Ulrich Welp

    • Argonne National Laboratory
    • Argonne Natl Lab
    • Materials Science Division, Argonne National Laboratory
    • Materials Science Division, Argonne Natl Lab
    • Argonne National Lab

  • Jong Woo Kim

    • APS, Argonne National Laboratory
    • APS, Argonne National Labs
    • Advanced Photon Source, Argonne National Laboratory
    • Argonne National Laboratory
    • Argonne Natl Lab
    • Argonne National Lab

  • Huibo Cao

    • Oak Ridge National Lab
    • Oak Ridge National Laboratory
    • Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
    • Neutron Scattering Division, Oak Ridge National Laboratory
    • Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
    • Oak Ridge Natl Lab

  • Alexei Koshelev

    • Argonne Natl Lab
    • Materials Science Division, Argonne National Laboratory
    • Materials Science Division, Argonne Natl Lab
    • Argonne National Lab

  • Kristin Willa

    • Karlsruhe Institute of Technology

  • Matthew Smylie

    • Hofstra University
    • Dept. of Physics and Astronomy, Hofstra University

  • Zhu Diao

    • Halmstad University

  • Andreas Rydh

    • stockholm university
    • university of stockholm
    • Stockholm University
    • Physics, Stockholm University

  • Jinke Bao

    • Argonne Natl Lab
    • Materials Science Division, Argonne Natl Lab
    • Argonne National Laboratory

  • Duck Young Chung

    • Argonne Natl Lab
    • Materials Science Division, Argonne National Laboratory
    • Materials Science Division, Argonne Natl Lab
    • Argonne National Laboratory
    • Material Science, Argonne National Laboratory

  • Mercouri Kanatzidis

    • Northwestern University
    • Materials Science Division, Argonne National Laboratory
    • Department of Chemistry, Northwestern University
    • Chemistry, Northwestern Univ

  • Wai-Kwong Kwok

    • Argonne National Laboratory
    • Material Sciences, Argonne National Laboratory
    • Argonne Natl Lab
    • Materials Science Division, Argonne National Laboratory
    • Materials Science Division, Argonne Natl Lab
    • Argonne National Lab

  • Stephan Rosenkranz

    • Materials Science Division, Argonne National Lab
    • Argonne National Laboratory
    • Argonne National Lab
    • Material Science Division, Argonne National Laboratory
    • Materials Science Division, Argonne National Laboratory
    • Argonne Natl Lab
    • Material Science, Argonne National Laboratory