Investigating Large-Area 2D Magnetic Materials with Neutron Reflectometry

2D magnetic materials and their heterostructures are promising for next-generation spintronic and magneto-optical devices. These technological applications require the large-area synthesis/exfoliation and characterization of single crystalline ultra-thin materials. Recently the family of Fe-based 2D magnetic materials has been fabricated in wafer-scale by molecular beam epitaxy. These 2D materials exhibit Curie temperatures at or above room temperature along with various magnetic effects. To investigate the nuclear and magnetic structure of these large-area ultra-thin materials, neutron reflectivity measurement can be useful because of its large beam size, high penetration depth, and magnetic sensitivity. This can be achieved by transferring 2D van der Waals materials on top of the substrate with additional layers, which amplify the reflectivity from ultra-thin materials. In this work, both molecular-beam epitaxy and neutron reflectometry for large-area 2D magnetic materials will be presented.