[animal531]

Yeah, doing some googling it seems that if you for example glue two together in a NS-SN type fashion that they would either turn into a single magnet as you are describing, or if its unstable then the two fields will demagnetize each other over some time.

But having said that, there's probably a few openings for research in there where you can experiment with different field/magnet shapes, sizes and counts.

[juancn]

You could in theory make that with two solenoids sharing a core and inverting the electric field and make it work like a NS-SN joined magnet.

But I guess it would heat up fairly quickly, having to fight the force of the opposing S-S poles. Now I want to try it.