Magnetism. How to describe the physics: Spin model In terms of electrons. Spin model: Each site has a spin S i. There is one spin at each site. The magnetization is proportional to the sum of all the spins.
How to describe the physics:
In terms of electrons
Last lecture we talk about J a little bit. We discuss the other contribution next
Free spin paramagnetism
Diamagnetism (filled shell)