Magnetic order in CaK(Fe1-xNix)4As4 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.

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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