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There are diamagnetic non-superconductors like pyrolytic graphite that can also evade Earnshaw's theorem, but this would be the first metal with this strength o
by johncolanduoni 3y ago
There are diamagnetic non-superconductors like pyrolytic graphite that can also evade Earnshaw's theorem, but this would be the first metal with this strength of diamagnetism at room temperature AFAIK.
- sudosysgen 3y agoPyrolitic graphite can evade Earnshaw's theorem only with either specific magnet array shapes or with rotation, they still can't stably levitate on a regular dipole without rotation.
- taneq 3y agoIt can be done at all with a static arrangement of magnetic fields, though? Ooh.
- TylerE 3y agoIsn’t that those floaty spinning desk toys are?
- johncolanduoni 3y agoThose usually use active electromagnets, which also bypass the preconditions of Earnshaw’s theorem.
- taneq 3y agoYou mean the ones with a DeLorean or whatever? Those are powered closed-loop-control devices. Or the spinning tops (Levitron etc.?) Those are dynamic and fall down when they stop spinning.