The Five Classes of Magnetic Material

There are many qualitative similarities between magnetic parameters and those we used to describe dielectrics in Chapter 31. 

In the former case, the material is responding to an applied magnetic field, and in the latter case, it is responding to an applied electric field. 

The similarities described above are not surprising. In both cases, we are concerned with the relationship between an external field and the dipoles within a material. Despite these similarities the physical 

Susceptibilities are generally used when the response to an applied magnetic field is weak (of interest only to physicists ). Permeabilities are used when the response is large—of great interest to engineers  

There are five main types of magnetic behavior and these can be divided into two general categories  

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This chapter provides a description of the most common magnetic materials used in electrical engineering and other industrial applications. The first section details the physical quantities used to describe the magnetic properties of materials, while the following sections describe the basic magnetic properties of the five classes of magnetic materials. 

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