Lecture
This lecture introduces the concept of magnetic hysteresis, focusing on the behavior of magnetization in ferromagnetic materials. It covers coercive fields, hysteresis loops, and the distinction between external and internal fields. The instructor explains the significance of saturation magnetization and permeability in different soft magnetic materials, illustrating the coercive field and Curie temperature. The history of coercive fields is discussed, highlighting the evolution of materials like steel, iron, and ferrites over time. The lecture concludes with a general overview of how to describe and interpret hysteresis curves.