I bought some sheets of magnetic material (sample 1
, sample 2
) to make some magnetic board games as holiday presents. The magnets seem to be behaving somewhat paradoxically.
I would expect the top of a sheet to be polarized magnetically either north or south, with the bottom of the sheet polarized oppositely. If this were true, it would enable me to make a game board out of a piece of the sheet, and make some pieces out of the rest of the sheet to stack on top of it. They would stick magnetically because the layers would be top-bottom-top-bottom, or NSNS, with north and south in closest contact.
Instead, what I'm finding is that pieces of magnet cut from the very same sheet
want to stick top-bottom-bottom-top, which I interpret as NSSN -- hence the paradox. The other way, they either stick weakly or not at all. I notice that when they're stuck this way, and I slide them against each other, there seem to be magnetic "ridges", so that the magnets skip and jump in regular patterns as I slide them.
I've tried mixing pieces cut from different samples (as linked above), but the result is the same.
Obviously, the magnets aren't polarized the way I originally thought. But how are they polarized? What's going on, and how can I salvage this situation so I can still make magnetic board games for my friends and family? Cheers.