Cheers, yeah it sounds like you're right "Multipole magnetic devices may be constructed from discrete permanent magnets, or by exposing heated magnetizable ma

Cheers, yeah it sounds like you're right "Multipole magnetic devices may be constructed from discrete permanent magnets, or by exposing heated magnetizable material to a coded magnetic field." - https://en.wikipedia.org/wiki/Programmable_magnet https://en.wikipedia.org/wiki/Programmable_magnet