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Comment by dclowd9901 | Hacker News Reader

Levitates? Against, what, the earth's inherent magnetic field? Sorry, I haven't seen any visuals that show this behavior.

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Over a handheld neodymium magnet.

None of the videos have yet shown complete 'levitation', they all have a corner on the surface. But still, not behavior that anyone has ever seen from lead before.

But couldn't it just be a magnet ? I don't understand how it's a proof. You can already do what is in the video (and even better), with for example, pyrolitic carbon ? https://en.wikipedia.org/wiki/Pyrolytic_carbon

It’s not proof, but if it wasn’t even diamagnetic it would be over. It couldn't just be a magnet, it is repelled from both ends of a normal magnet, according to Chinese lab videos you can find in the thread.

Lead weighs a lot more than pyrolytic carbon.

Have you seen videos of pyrolytic carbon? A thin sliver of it barely hovers on top of a huge magnet. It doesn’t stand erect. Same effect as LK99 but much smaller magnitude.

No, digmagnetic of levitation requires multiple magnets in a halbac array: https://www.kjmagnetics.com/blog.asp?p=diamagnetic-levitatio...

https://pubs.aip.org/aip/apm/article/9/10/101107/1061600/Pho...

Levitation in magnetic itself is not the proof. Frogs can do that too, ask Geim. The proof would be levitation in any orientation.

> Frogs can do that too

One even did that on the cover of Nature, iirc.

When do we start building things out of superconducting frogs?

Using a 'slightly' stronger magnetic field...

Only over an electromagnet, not a fixed one (to our knowledge). Digmagnetic levitation requires more than one magnet or an electromagnet.

https://en.m.wikipedia.org/wiki/Magnetic_levitation

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