Exchange Interaction: Basic Concepts

This lecture introduces the basic concepts of exchange interaction in magnetic materials, discussing the discrimination between different magnetic materials based on their properties, critical temperatures, and saturation magnetization. It covers the major classifications of magnetic properties and their relation to materials, including diamagnetism, paramagnetism, ferromagnetism, ferrimagnetism, and antiferromagnetism. The lecture also explores the critical temperatures of various ferromagnets and ferrimagnets, as well as the intrinsic and extrinsic properties of compounds relevant to permanent magnetism.