Models for magnetic materials

Linear Isotropic Non-Ferromagnetic Materials

$$\input{equations/nye-H-iso-model}$$ (06-13)

$\psi$ is the magnetic susceptibility, is relates the local microscopic alignment of the individual magnetic moments to the applied field.

If $\psi > 0$, the magnetic moments align with the field--this is called a paramagnetic material

If $\psi < 0$, the magnetic moments align anti-parallel with the field--this is called a diamagnetic material

Combining Eq. 6-11 with Eq. 6-13, we get the definition of magnetic permeability $\mu$ for an isotropic magnetic material:

$$\input{equations/nye-B-model}$$ (06-14)

And from this follows the associated magnetic work for this model: