Question: How many different types of magnets are there?

Giuditta Perversi answered on 12 Nov 2015:

Reeeeeally a lot, magnetism is a really complicated field!

Electromagnets are currently the strongest and you use them in magnetic resonance in hospitals. They create the magnetic field with a flow of electricity in a wire.
Permanent magnets are the same kind that you use to stick things to your fridge and whatever you do with them they always have this magnetic field floating around them and attracting stuff.
Then we have paramagnetism, ferromagnetism and antiferromagnetism (plus some other less common ones) that don’t exactly make “magnets”: they are a label you put on materials to identify the way they react to an external field (there are permanent magnets with ferromagnetic behaviour, the things are not mutually exclusive 😉 ).

Nice thing about this type of definitions and label is that they are variable with temperature, pressure and composition/method of creation of your material. It’s never “always that way in every condition”!