In the drawing below, current can't flow between the discs separated by the insulating material. This will cause the discs to act similar to a capacitor. Since current can't flow between the discs, then it doesn't create a strong magnetic field.
If we allow the current to flow between the discs by attaching the discs electrically at the rim, then it should create a strong magnetic field on the discs.
My question is, How will the magnetic field be on the discs in both setups? Example, will half the discs have a north pole and the other half have a south pole. Could we use this somehow to confine the magnetic field of the magnet so it doesn't interact with the external circuit?
GB
Stacked discs on both sides of magnet. Bottom side of magnet, the discs are electrically connected together to create a strong magnetic field on that side. Then the current will flow from the rim of the bottom discs to the axle of the top discs.
It may be worth trying to create a coil-based disk, rather than a layered disk. ..the coil current would reinforce the magnetic one, and thus, the field strength wouldn't be a severe an affect?
Just a thought.
The coil would have to be wound, the magnet orientation correct so that the two don't interfere.
Otherwise you may have a Bloch wall generator or some sort. :)