Lecture 19 in a series of 21 lectures on solid state physics, delivered by Professor Steven H. Simon in early 2014.  Creative Commons Attribution-Non-Commercial-Share Alike 2.0 UK: England & Wales; http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

20. Collective Magnetism

This lecture series constitutes a first undergraduate course in solid state physics delivered in an engaging and entertaining manner by Professor Steven H. Simon of Oxford University. Standard topics such as crystal structure, reciprocal space, free electrons, band theory, phonons, and magnetism are covered. The sequence of the lectures matches that of the book "The Oxford Solid State Basics" (OUP, 2013).