Main Question or Discussion Point
Is it true that every material can be attracted by a magnetic field provided that the magnetic field is STRONG enough?
Hmmm... As an extreme example: copper is an element known as a great magnetic "insulator", but if a strong enough magnetic field would be applied - would it be repelled or attracted?Try magnetic susceptibility. This is the quantity that may be what you need, for materials with weak magnetism:
- paramagnetic - weakly attracted by a strong magnet
- diamagnetic - weakly repelled
For ferromagnetic materials the susceptibility or permeability may give some information.
So no, not any material is attracted. It may be repelled.
And when is weakly attracted does not mean it is ferromagnetic.