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The bilayer of CrI3 is a prototypical van der Waals 2D antiferromagneticmaterial with magnetoelectric effect. It is not generally known, however, thatfor symmetry reasons the flexomagnetic effect, i.e., the straingradient-induced magnetization, is also possible in this material. In thepresent paper, based on the first principle calculations, we estimate theflexomagnetic effect to be 200 {\mu}B{\AA} that is two orders of magnitudehigher than it was predicted for the referent antiperovskite flexomagneticmaterial Mn3GaN. The two major factors of flexomagnetic effect enhancementrelated to the peculiarities of antiferromagnetic structure of van der Waalsmagnets is revealed: the strain-dependent ferromagnetic coupling in each layerand large interlayer distance separating antiferromagnetically coupled ions.Since 2D systems are naturally prone to mechanical deformation, the emergingfield of flexomagnetism is of special interest for application in spintronicsof van der Waals materials and straintronics in particular.

The curvature-induced magnetization in CrI3 bilayer: flexomagnetic effect enhancement in van der Waals antiferromagnets