WEB DPC-STEM observation of magnetic domains in Fe-Si alloy manufactured by laser beam melting
Soft magnetic materials have important applications in electrical devices. Magnetic domains in soft magnetic materials have strong implications on their soft magnetic properties. The present investigation observes the in-situ magnetic domain evolution upon exposure to magnetic field in Fe-Si alloy. The Fe-Si alloy is manufactured by laser beam melting (LBM). The LBM processing parameter are optimised to reduce porosity. The observation of magnetic domains is done by differential phase-contrast scanning transmission electron microscopy (DPC-STEM). The DPC-STEM images are captured in near field free conditions, before and after exposure to a magnetic field. Thus the evolution of magnetic domains upon the application of magnetic field can be observed. The mean domain width changes upon the application of magnetic field.