Multiple ferromagnetic transitions and structural distortion in the van der Waals ferromagnet VI<sub>3</sub> at ambient and finite pressures

ORAL

Abstract

Magnetic van-der-Waals (vdW) materials are considered as promising candidate systems to realize low-dimensional ferromagnetism in semiconductors. Here, we present a thermodynamic (specific heat and magnetization) and microscopic NMR study on bulk single crystals of the recently discovered ferromagnetic vdW material VI3 at ambient and finite pressures [1]. Our results show that VI3 undergoes a structural transition, which is subsequently followed by two ferromagnetic transitions at ambient pressure, giving rise to two distinct magnetically-ordered V sites for low temperatures. Upon increasing pressure, the two magnetic transitions merge at p ~ 0.6 GPa, and for even higher pressures (p ~ 1.25 GPa) merge with the structural transition. From these observations, we infer that the magnetic structure in bulk single crystals of VI3 is complex, with magnetoelastic coupling being of significant importance.
[1] E. Gati et al., Phys. Rev. B 100, 094408 (2019) (Editor’s suggestion).

**This work was carried out at Iowa State University and supported by Ames Laboratory, US DOE, under Contract No. DE-AC02- 07CH11358. Work conducted at Princeton University was supported by the NSF-sponsored PARADIGM program centered at Cornell University, Grant No. DMR-1539918.

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Presenters

  • Elena Gati

    • Iowa State University, Ames Laboratory
    • Ames Lab

Authors

  • Elena Gati

    • Iowa State University, Ames Laboratory
    • Ames Lab

  • Yuji Inagaki

    • Iowa State University, Ames Laboratory

  • Tai Kong

    • Chemistry, Pinceton University
    • Princeton University

  • Robert J. Cava

    • Princeton University
    • Chemistry, Princeton University
    • Department of Chemistry, Princeton University
    • Chemistry, Pinceton University
    • Princeton Univ

  • Yuji Furukawa

    • Ames Laboratory and Dept. of Phys. and Astro., Iowa State University
    • Iowa State University
    • Iowa State University, Ames Laboratory
    • Division of Materials Sciences & Engineering, Ames Lab and Iowa State University

  • Sergey L. Bud'ko

    • Iowa State University
    • Ames Laboratory and Iowa State University
    • Ames Lab
    • Ames laboratory, Ames, IA
    • Department of Physics & Astronomy, Iowa State University/Ames Laboratory
    • Ames Laboratory
    • Department of Physics and Astronomy, Iowa State University/Ames Laboratory
    • Iowa State University and Ames Laboratory
    • Iowa State University, Ames Laboratory
    • Division of Materials Sciences & Engineering, Ames Lab and Iowa State University
    • Iowa State University/Ames Laboratory

  • Paul C Canfield

    • Iowa State University
    • Ames Laboratory and Iowa State University
    • Ames Lab
    • Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
    • Ames laboratory, Ames, IA
    • Ames Laboratory, Iowa State University
    • Department of Physics & Astronomy, Iowa State University/Ames Laboratory
    • Department of Physics and Astronomy, Iowa State University/Ames Laboratory
    • Iowa State University and Ames Laboratory
    • Iowa State University, Ames Laboratory
    • Department of Physics and Astronomy, Iowa State University
    • Division of Materials Sciences & Engineering, Ames Lab and Iowa State University
    • Department of Physics and Astronomy, Ames Laboratory/Iowa State Univeristy
    • Iowa State University/Ames Laboratory