Analysis coming soon.
(Coey has some great plots that I’ll try to include later.)
More notes from Coey:
- Magnetic material industry is about $30 billion per year
- Three main applications are permanent magnets (high coercivity), soft magnets (low coercivity), and magnetic recording (which has middling coercivity)
- Permanent magnets are mostly either ferrites (mostly Ba2Fe12O19 or Sr2Fe12O19) or NdFeB. Their main application is motors and generators
- Soft magnets are mostly Fe-Si and they are used in inductor cores (e.g., transformers)
- Magnetic recording (i.e., hard drives) use some combination of Co, Fe, Cr, Ni, O ??
- Iron is extremely abundant on Earth, which is pretty fortunate because in many ways it’s the best magnetic element
- More coming…