Structure and Magnetism of Chiral Mn<sub>5</sub>Si<sub>2</sub>

ORAL

Abstract

Magnets with chiral crystal structures and Dzyaloshinskii-Moriya (DM) interactions have recently attracted much attention as potential spin-electronics materials [1]. Mn-based intermetallic compounds have gained particular interest, because they often favor noncoplanar spin structures including skyrmions [2, 3], and their magnetic and electron-transport properties are also tunable by alloying and varying Mn content [3]. In this work, Mn5+xSi2-x alloys (x = 0, 0.1, and 0.2) were prepared using arc-melting process followed by annealing at 800 °C for 12 hours. Rietveld refinement analysis on x-ray diffraction data shows that the Mn5Si2 compounds form tetragonal structure with a = 8.914 Å and c = 8.719 Å and a space group P41212, which can support spin spirals caused by DM interactions. The effect of Mn/Si ratio on the magnetic properties will be discussed.

*This research is supported by NU Collaborative Research and NSF-DMREF:SusChem (Grant No. 1729288).

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Publication: [1] B. Balasubramanian et al. Phys. Rev. Lett. 124, 057201(2020)
[2] B. Das et al. Nanoscale 10, 9504 (2018).
[3] W. Zhang et al. J. Magnet. Magnet. Mater. 537, 168104 (2021).

Presenters

  • Ahsan Ullah

    • University of Nebraska - Lincoln

Authors

  • Ahsan Ullah

    • University of Nebraska - Lincoln

  • Balamurugan Balasubramanian

    • University of Nebraska - Lincoln

  • Wenyong Zhang

    • University of Nebraska-Lincoln

  • Shah Valloppilly

    • University of Nebraska-Lincoln
    • University of Nebraska

  • Renat Sabirianov

    • University of Nebraska - Omaha

  • Ralph Skomski

    • University of Nebraska - Lincoln

  • David J Sellmyer

    • University of Nebraska-Lincoln
    • University of Nebraska - Lincoln