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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).

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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