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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.

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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