Magnetic order in CaK(Fe<sub>1-x</sub>Ni<sub>x</sub>)<sub>4</sub>As<sub>4</sub> and its interplay with superconductivity

ORAL

Abstract

CaK(Fe1-xNix)4As4 shows a phase diagram remarkably similar to other Fe-based superconductors - by changing the Ni concentration the properties can be tuned from purely superconducting at low temperatures to superconducting and antiferromagnetically ordered. Here we present a microscopic study of the magnetism employing neutron diffraction measurements on single crystals. Although the antiferromagnetic order adopts a non-collinear structure conserving tetragonal symmetry, its propagation vectors are the same as for the stripe-like magnetic order that is frequently present in Fe-based superconductors. This points to a similar underlying coupling mechanism that forsters the observed strong interplay between magnetism and superconductivity.

*This work was supported by the U. S. Department of Energy, Basic Energy Sciences, Division of Materials Sciences and Engineering, under Contract No. DE-AC02-07CH11358. A portion of this research used resources at the High Flux Isotope Reactor, a U. S. DOE Office of Science User Facility operated by the O

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Presenters

  • Andreas Kreyssig

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

Authors

  • Andreas Kreyssig

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

  • John Wilde

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

  • Anna Böhmer

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

  • Wei Tian

    • Oak Ridge National Laboratory
    • Neutron Sciences Directorate, Oak Ridge National Laboratory
    • Neutron Scattering Division, Oak Ridge National Laboratory
    • Oak Ridge National Lab

  • William Meier

    • Iowa state university/Ames Laboratory
    • Iowa State University and Ames Laboratory
    • Iowa State University/Ames Laboratory
    • Ames Laboratory and Iowa State University, Dept. of Physics and Astronomy
    • Dept. of Physics, Iowa State Univ
    • Ames Laboratory

  • Mingyu Xu

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

  • Sergey Bud'ko

    • The Ames Laboratory
    • Iowa state university/Ames Laboratory
    • Iowa State University and Ames Laboratory
    • Iowa State University/Ames Laboratory
    • Iowa State University / Ames Laboratory
    • Ames Laboratory and Iowa State University, Dept. of Physics and Astronomy
    • Dept. of Physics, Iowa State Univ
    • Ames Lab
    • Ames Laboratory U.S. DOE and Department of Physics and Astronomy, Iowa State University
    • Ames Laboratory
    • Department of Physics and Astronomy, Ames Laboratory and Iowa State University

  • Paul Canfield

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

  • Robert McQueeney

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

  • Alan Goldman

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