Exploring Unconventional Domain Walls of Few-Layer van der Waals Magnets

Controllable magnetic states in nanomagnetic devices offer a promising approach for next-generation information technology. To this end, harnessing magnetic domains and in particular, domain walls which are topological solitons robust against local perturbations, are essential. Over the past decade, 2D magnetism in vdW materials has emerged rapidly as a new platform capable of competing with conventional magnets. Our work focuses on exploring novel domain wall configurations in few-layer CrI3 enabled collectively by inter- and intra-layer exchange, DM interaction, and anisotropy, all with comparable strengths. We employ both analytic coarse-grained theory and atomistic micromagnetic approaches to reveal the origin of such nontrivial domain walls and their tunability by external fields.