"...aluminum or gold of which neither are magnetic."
Just because people call it a demagnetizer does not mean it is used as such, or that is what it is doing. Consider a transformer - the copper (not magnetic) wires are certainly effected by the magnetic field. Or look up inductive heating. Or best because it is so cool to watch: get a copper pipe and a strong disc magnet that just fits inside the pipe, drop the magnet through the pipe. Need an explanation, google eddy currents.
Bill
Just because people call it a demagnetizer does not mean it is used as such, or that is what it is doing. Consider a transformer - the copper (not magnetic) wires are certainly effected by the magnetic field. Or look up inductive heating. Or best because it is so cool to watch: get a copper pipe and a strong disc magnet that just fits inside the pipe, drop the magnet through the pipe. Need an explanation, google eddy currents.
Bill