Neutron diffraction results on the in-field magnetic structure of YMn<sub>6</sub>Sn<sub>6</sub>

ORAL

Abstract

A current focus of condensed matter physics is to find materials where magnetism can tune topological properties or vice versa. Research has focused on the study of non-centrosymmetric compounds with Dzyaloshinskii-Moriya interactions, but recent studies suggest that magnetic frustration is another route to search for topological properties. Our measurements indicate that YMn6Sn6 is a promising candidate to explore the interplay of magnetic and topological properties. It is a centrosymmetric, antiferromagnetic (AF) metal with layered kagome networks of magnetic Mn atoms. The ground state magnetic structure is helical and competing ferromagnetic and AF interlayer exchange is the source of frustration in the system. The structure is far from standard though, as two, long-range, incommensurate wavevectors persist throughout a large region of the B-T phase space. We will focus on neutron diffraction data that track the evolution of these two wavevectors as a function of magnetic field, which clearly elucidates the nature of the multiple field-induced transitions seen in AC susceptibility. Additionally, the topological Hall resistivity undergoes changes as a function of field that can be connected to those in the magnetic structure, signifying a strong interplay between the two.

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Presenters

  • Rebecca Dally

    • National Institute of Standards and Technology
    • NIST Center for Neutron Research, National Institute of Standards and Technology

Authors

  • Rebecca Dally

    • National Institute of Standards and Technology
    • NIST Center for Neutron Research, National Institute of Standards and Technology

  • Lekhanath Poudel

    • NIST Center for Neutron Research
    • NIST Center for Neutron Research, National Institute of Standards and Technology
    • Department of Materials Science and Engineering, University of Maryland, College Park

  • Nishchal Thapa Magar

    • Department of Physics and Astronomy, George Mason University

  • Markus Bleuel

    • Center for Neutron Research, National Institute of Standards and Technology
    • National Institute of Standards and Technology Center for Neutron Research
    • NIST
    • NIST Center for Neutron Research, National Institute of Standards and Technology
    • National Institute of Standards and Technology

  • J Samuel Jiang

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

  • Michael McGuire

    • Oak Ridge National Laboratory
    • Materials Science and Technology Division, Oak Ridge National Laboratory
    • Oak Ridge National Lab
    • Materials Science Division, Oak Ridge National Laboratory

  • John Mitchell

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

  • Jeffrey Lynn

    • NIST Center for Neutron Research, National Institute of Standards and Technology
    • NIST
    • Center for Neutron Research, National Institute of Standards and Technology
    • National Institute of Standards and Technology
    • NIST Center for Neutron Research

  • Nirmal Ghimire

    • Department of Physics and Astronomy, George Mason University
    • George Mason University
    • Argonne Natl Lab