This lecture serves to provide students with a basic understanding of the theoretical description of magnetism in solids.

The following topics related to the atomic and electronic fundamentals of magnetism will be covered:

• Spin and magnetic moment
• Magnetic order in solids
• Exchange and relativistic interactions
• Atomistic and ab initio models
• Effective spin models
• Continuum and micromagnetic descriptions
• Magnetization dynamics
• Symmetry and topology of magnetic structures
• Topological textures in nano- and thin-film systems