Magnetic order and its interplay with structure phase transition in van der Waals ferromagnet VI${}_3$

Abstract

Van der Waals magnet VI${}_3$ demonstrates intriguing magnetic properties that render it great for use in various applications. However, its microscopic magnetic structure has not been determined yet. Here, we report neutron diffraction and susceptibility measurements in VI${}_3$ that revealed a ferromagnetic order with the moment direction tilted from the $c$-axis by ~36° at 4 K. A spin reorientation accompanied by a structure distortion within the honeycomb plane is observed at a temperature of ~27 K, before the magnetic order completely disappears at $T_C$ = 50 K. The refined magnetic moment of ~1.3 ${\mu }_B$ at 4 K is considerably lower than the fully ordered spin moment of 2 ${\mu }_B$/ V${}^{3+}$, suggesting the presence of a considerable orbital moment antiparallel to the spin moment and strong spin-orbit coupling in VI${}_3$. This results in strong magnetoelastic interactions that make the magnetic properties of VI${}_3$ easily tunable via strain and pressure.

arXiv comment8 pages, 4 figures

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Cited by in corpus (10)

• Large orbital magnetic moment in VI3
• Strain tunability of perpendicular magnetic anisotropy in van der Waals ferromagnets VI3
• Signatures of Kitaev interactions in the van der Waals ferromagnet VI3
• Ferromagnetic ferroelectricity due to the Kugel-Khomskii mechanism of the orbital ordering assisted by atomic Hund's second rule effects
• Terahertz Magnetic and Lattice Excitations in van der Waals Ferromagnet VI3
• FeS2 monolayer: a high valence and high-$T_{\mathrm{C}}$ Ising ferromagnet
• Lattice and magnetic structure in the van der Waals antiferromagnet VBr3
• Evidence of temperature-dependent interplay between spin and orbital moment in van der Waals ferromagnet VI3
• Angular-Dependent Thermal Hall Effect in a Honeycomb Magnet: Disentangling Kitaev and Dzyaloshinskii-Moriya Interactions
• Valence Modifications in Hygroscopic VI3 Degraded Crystals via Soft X-Ray Synchrotron Radiation