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.
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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)