Magnetic field tuning of modulated magnetic orders in CrOCl at the two-dimensional limit

Abstract

Chromium oxychloride is a van der Waals magnet with intrinsic competing exchange interactions, including a strong antiferromagnetic one, source of a very rich magnetic phase diagram, with ferrimagnetic, antiferromagnetic, and canted states, up to high magnetic fields. We investigate the sequence of these magnetic phases in thin layers of CrOCl using magneto-Raman scattering spectroscopy. We identify phases whose magnetic order is commensurate with the atomic lattice, and find signatures of strong magneto-striction, presumably of exchange origin. The coupling of the spin and atomic degrees of freedom in the crystal is observed down to the single-layer limit -- phonon modes significantly soften or stiffen, in a complex way due to the competition of interactions. The existence domains of the different phases change with the number of layers.

24 pages, 6 figures

References in corpus (16)

• Anomalous Lattice Vibrations of Single and Few-Layer MoS2
• Role of the Dzyaloshinskii-Moriya interaction in multiferroic perovskites
• Ising-Type Magnetic Ordering in Atomically Thin FePS3
• Ferroelectric polarization flop in a frustrated magnet MnWO${}_4$ induced by magnetic fields
• Magnetic Order and Symmetry in the 2D Semiconductor CrSBr
• Spin-flop transition in atomically thin MnPS${}_3$ crystals
• A New Multiferroic Material: MnWO4
• Magnetic-induced phonon anisotropy in ZnCr${}_2$O${}_4$ from first principles
• Probing defects and spin-phonon coupling in CrSBr via resonant Raman scattering
• Magnon-polarons in van der Waals antiferromagnet FePS3
• Raman scattering signatures of the strong spin-phonon coupling in the bulk magnetic van der Waals material CrSBr
• Multi-state data storage in a two-dimensional stripy antiferromagnet implemented by magnetoelectric effect
• High pressure tuning of magnon-polarons in the layered antiferromagnet FePS${}_3$
• A simple KPFM-based approach for electrostatic-free topographic measurements: the case of MoS${}_2$ on SiO${}_2$
• Exchange striction induced thermal Hall effect in van der Waals antiferromagnet MnPS${}_3$
• Magnetic phases and zone-folded phonons in a frustrated van der Waals magnet