Re:A Room-Temperature Superconductor? New Developments
by itsarnavb on Tuesday August 01, 2023 @01:48PM
(#36959611)
And the techniques to produce the material are not too crazy, all within reach of sufficiently dedicated amateurs
Re:A Room-Temperature Superconductor? New Developments
by dclowd9901 on Tuesday August 01, 2023 @02:05PM
(#36959887)
Levitates? Against, what, the earth's inherent magnetic field? Sorry, I haven't seen any visuals that show this behavior.
Re:A Room-Temperature Superconductor? New Developments
by marshray on Tuesday August 01, 2023 @02:35PM
(#36960375)
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.
Re:A Room-Temperature Superconductor? New Developments
by rvnx on Tuesday August 01, 2023 @02:50PM
(#36960607)
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
Re:A Room-Temperature Superconductor? New Developments
by aeneasmackenzie on Tuesday August 01, 2023 @03:01PM
(#36960841)
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.
Re:A Room-Temperature Superconductor? New Developments
by marshray on Tuesday August 01, 2023 @05:03PM
(#36962863)
Lead weighs a lot more than pyrolytic carbon.
Re:A Room-Temperature Superconductor? New Developments
by zarzavat on Tuesday August 01, 2023 @08:54PM
(#36965510)
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.
Re:A Room-Temperature Superconductor? New Developments
by zbobet2012 on Wednesday August 02, 2023 @02:11AM
(#36967555)
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...
Re:A Room-Temperature Superconductor? New Developments
by failuser on Tuesday August 01, 2023 @02:56PM
(#36960721)
Levitation in magnetic itself is not the proof. Frogs can do that too, ask Geim. The proof would be levitation in any orientation.
Re:A Room-Temperature Superconductor? New Developments
by _0ffh on Tuesday August 01, 2023 @03:27PM
(#36961292)
> Frogs can do that too
One even did that on the cover of Nature, iirc.
Re:A Room-Temperature Superconductor? New Developments
by andersa on Tuesday August 01, 2023 @04:08PM
(#36961932)
When do we start building things out of superconducting frogs?
Re:A Room-Temperature Superconductor? New Developments
by jacquesm on Tuesday August 01, 2023 @04:55PM
(#36962741)
Using a 'slightly' stronger magnetic field...
Re:A Room-Temperature Superconductor? New Developments
by zbobet2012 on Wednesday August 02, 2023 @02:15AM
(#36967582)
Only over an electromagnet, not a fixed one (to our knowledge). Digmagnetic levitation requires more than one magnet or an electromagnet.
No need to squint into a microscope, parse a screen full of numbers, or try to make sense of false-color renderings. Either you have video proof of a levitating object, or you don't. The demonstration is as intuitive as it gets, despite the fact that the theory is crazy difficult to wrap one's head around.