ABSTRACT
In this chapter we look at the magnetic properties of materials. The magnetic properties are a special subgroup of the electronic properties of materials which really form a separate subject. Nevertheless they can also be considered as an integral part of the electronic properties of materials. The most important and interesting magnetic state of a material is known as ferromagnetism. In this case the relative permeability can be very high. This makes these materials useful in transformers and inductors. Another property of ferromagnets is their retention of magnetization. This is utilized in permanent magnets for both motors and generators. In addition, particulate and thin film magnetic materials are used for magnetic recording purposes. This application represents a very large market, both for magnetic materials and the associated electronic support systems for magnetic recording.
