2025/11/13 by Ming-Zhong Ai, Ai, Ming-Zhong, Kang‐Yuan Liu +19
Physics and Astronomy · Engineering · Materials Science · #Magnetic properties of thin films #Metallic Glasses and Amorphous Alloys #Diamond and Carbon-based Materials Research
paper · pdf · doi:10.48550/arxiv.2511.10176
Measurement of the magnetization in the bulk of thin-film or two-dimensional materials is important for understanding their intrinsic properties without the complications from edges or domain walls. However, the stray fields from the bulk vanish or are very weak, which limits the application of direct measurement methods. Here, we develop a non-destructive approach to directly measuring the stray fields from the bulk of thin-film magnets at arbitrarily designatable locations, with nanoscale spatial resolution. We employ nano-indentation to induce the leakage of stray fields from the materials and use nano-diamond magnetometers to measure them. We apply the method to iron thin films and determine the intrinsic magnetization in the bulk of the materials. This work provides direct access to the intrinsic magnetic properties of thin-film and low-dimensional materials, as well as a method to study the mechanical effects on magnetization in nanomaterials.