Electromagnetics: Basics, Forces, and Applications in MEMS

This lecture covers the basics of magnetism, including magnetization, magnetic field strength, and magnetic induction. It explores different types of magnetic substances and their properties, such as paramagnetic, diamagnetic, and ferromagnetic. The scaling of magnets for small single domains is discussed, along with the transition to superparamagnetic particles. Applications of electromagnetics in MEMS are highlighted, such as magnetic bead self-assembled columns for separation and manipulation of beads with planar coils. The lecture also delves into magnetic forces on beads from wires carrying current, magnetic tweezers for stretching molecules, and video analysis with high resolution for small force measurements.