Conversation:

"The entire guitar pickup, that visible thing under the guitar strings, is actually a casing containing an array of magnetic poles - usually one per string - which are connected to a master magnet that has the coil wrapped around it. Sometimes the individual poles are visible as little circular bumps under each guitar string."

The coil is actually wrapped around a plastic or fiber bobbin, in most cases, with the magnet under the bobbin in contact with the bottom end of the polepieces.

and i thought magnetisation was only for proper alignment between the domains for internal interaction is unreliable