Two-dimensional van der Waals single crystals DyOBr and SmOCl have been grown by flux method and their anisotropic magnetic properties are reported.DyOBr orders antiferromagnetically at TN =9.5 K with magnetic moments lying along a-axis, similar as DyOCl.Its magnetic susceptibility shows an anomaly at T * =30 K possibly due to the crystal field effect.Furthermore a 1/3 magnetization plateau is clearly observed under H a and H [110], which might be a fieldinduced spin-flop phase or some exotic quantum magnetic state.On the other hand, isostructural SmOCl undergoes an antiferromagnetic transition at TN =7.1 K and exhibits a contrasting Isinglike perpendicular c-axis magnetic anisotropy, which could be well explained by our crystal field calculations.Both DyOBr and SmOCl are insulators with band gap of ∼5 eV, our results suggest they are promising in building van der Waals heterostructures and applications in multifunctional devices.
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Pan et al. (2024) studied this question.
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