Antiferromagnetism of Fe<sub>1/3</sub>NbS<sub>2 </sub>as Characterized by Resonant Ultrasound Spectroscopy

ORAL

Abstract

Fe1/3NbS2 is an intercalated transition metal dichalcogenide with electrically switchable antiferromagnetic order below 42 K [1]. If demonstrated in a room-temperature antiferromagnet, this type of switching could be the foundation of faster and more compact memory storage devices. Neutron scattering and magnetic susceptibility measurements have revealed two distinct antiferromagnetic phases in this material, but have left some ambiguity about their nature and symmetry. We have used resonant ultrasound spectroscopy to further characterize the antiferromagnetism of Fe1/3NbS2. With RUS we can determine a material's elastic moduli from its mechanical resonances. As the material undergoes a phase transition, the response of the different elastic moduli reveals the symmetry of the order parameter. By precisely identifying these symmetries, we hope to shed new light on the mechanism of Fe1/3NbS2's electrical switching.

[1] Nair, N. L. et al. Nat. Mater. Lett. 19, 153-157 (2019).

*This research used resources of NERSC, a User Facility supported by the Office of Science of the U.S. DOE under Contract No. DE-AC02-05CH11231.

This work was supported by the Gordon and Betty Moore Foundation's EPiQS Initiative through Grant GBMF4374.

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Presenters

  • Gabriel Perko-Engel

    • University of California, Berkeley

Authors

  • Sylvia Lewin

    • University of California, Berkeley

  • Gabriel Perko-Engel

    • University of California, Berkeley

  • Shannon Haley

    • University of California, Berkeley

  • Eran Maniv

    • University of California, Berkeley

  • James Analytis

    • University of California, Berkeley
    • University of California at Berkeley
    • Physics, University of California, Berkeley