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I have no idea about the numbering, but I know of at least
- Ferromagnetism (like a fridge magnet)
- Antiferromagnetism (opposite of ferromagnetism at an atomic level)
- Diamagnetism (makes superconductors float)
- Paramagnetism (like that spinny frog)
These all indicate how a material reacts to a magnetic field. This article discusses “altermagnetism”, which is somewhere between ferromagnetism and antiferromagnetism.
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