5 ms·

> There have been multiple videos of tiny LK99 specs completely levitating on single magnets, and resisting motion when pushed, and staying afloat when the mag

> There have been multiple videos of tiny LK99 specs completely levitating on single magnets, and resisting motion when pushed, and staying afloat when the magnet is inverted. One of those has already been admitted to being outright faked: https://www.tomshardware.com/news/lk-99-video-fraud-taken-down https://www.tomshardware.com/news/lk-99-video-fraud-taken-do...

brucethemoose2 3y ago
I havent seen this video. I am on mobile now, I will have to go back through my history and check the claims... But one such reproduction is from the Meissner or Bust channel. They have been documenting the production for days, and IIRC they showed full levitation on a single magnet.
- crdrost 3y ago
  I believe you are remembering [1] and it is not a full levitation. 1. https://twitter.com/andrewmccalip/status/1687405505604734978 https://twitter.com/andrewmccalip/status/1687405505604734978
zhangjunphy 3y ago
Some additional context here. The author has a further statement, in which he apologizes that the previous video was misleading due to two points: 1. The sample was not LK99. 2. Both the larger piece held by the tweezers and the smaller levitating one were from the same sample. But he also states that no tricks of any kind were used nor the video was edited. So, some other material levitating itself in seemingly room temperature? Currently this guy is practically using his real name, with his university and professor exposed. It takes some courage to lie at this point. link(in Chinese): https://bilibili.com/video/BV1Zh4y1r7XL https://bilibili.com/video/BV1Zh4y1r7XL ====================== Edit: People sometimes speak in convoluted ways. I feel "The sample was not LK99" could have two interpretations here: 1. It is a completely different compound. 2. It is a derivative from LK99 with a different synthesis/doping method.
- imtringued 3y ago
  >Currently this guy is practically using his real name, with his university and professor exposed. It takes some courage to lie at this point. No, it doesn't. It is a nine second video. Not a research paper. Right now the topic is being hyped up and you might care but next year nobody is going to give a damn about some random video uploaded to bilibili. Why does everyone on HN pretend that even the smallest of missteps is going to end a reserachers career and therefore even videos with almost no effort put into them, that to feed the rumor mills, are somehow the paragon of truth?
- vinnyvichy 3y ago
  There's a third interpretation: he took an x-ray of both bits of the sample and found that the XRD pattern of the levitating flake didn't match LK99's
ummonk 3y ago
That video was so obviously not LK-99 I doubt anyone sane was fooled by it (anybody who has played with magnets knows that’s how ferrous metal hangs off of them). We’ve seen proper levitation of specks that hasn’t been falsified yet. That said, I believe theory has shown it’s actually possible for a diamagnetic object to fully levitate over a magnet as long as it’s light enough, but unlike a flux-pinned superconductor, it will only levitate over the center of the magnet, as is happening in all the levitation videos.

brucethemoose2 3y ago

I havent seen this video. I am on mobile now, I will have to go back through my history and check the claims... But one such reproduction is from the Meissner or Bust channel. They have been documenting the production for days, and IIRC they showed full levitation on a single magnet.

crdrost 3y ago
I believe you are remembering [1] and it is not a full levitation. 1. https://twitter.com/andrewmccalip/status/1687405505604734978 https://twitter.com/andrewmccalip/status/1687405505604734978

zhangjunphy 3y ago

Some additional context here. The author has a further statement, in which he apologizes that the previous video was misleading due to two points: 1. The sample was not LK99. 2. Both the larger piece held by the tweezers and the smaller levitating one were from the same sample. But he also states that no tricks of any kind were used nor the video was edited. So, some other material levitating itself in seemingly room temperature? Currently this guy is practically using his real name, with his university and professor exposed. It takes some courage to lie at this point. link(in Chinese): https://bilibili.com/video/BV1Zh4y1r7XL https://bilibili.com/video/BV1Zh4y1r7XL ====================== Edit: People sometimes speak in convoluted ways. I feel "The sample was not LK99" could have two interpretations here: 1. It is a completely different compound. 2. It is a derivative from LK99 with a different synthesis/doping method.

imtringued 3y ago
>Currently this guy is practically using his real name, with his university and professor exposed. It takes some courage to lie at this point. No, it doesn't. It is a nine second video. Not a research paper. Right now the topic is being hyped up and you might care but next year nobody is going to give a damn about some random video uploaded to bilibili. Why does everyone on HN pretend that even the smallest of missteps is going to end a reserachers career and therefore even videos with almost no effort put into them, that to feed the rumor mills, are somehow the paragon of truth?
vinnyvichy 3y ago
There's a third interpretation: he took an x-ray of both bits of the sample and found that the XRD pattern of the levitating flake didn't match LK99's

ummonk 3y ago

That video was so obviously not LK-99 I doubt anyone sane was fooled by it (anybody who has played with magnets knows that’s how ferrous metal hangs off of them). We’ve seen proper levitation of specks that hasn’t been falsified yet. That said, I believe theory has shown it’s actually possible for a diamagnetic object to fully levitate over a magnet as long as it’s light enough, but unlike a flux-pinned superconductor, it will only levitate over the center of the magnet, as is happening in all the levitation videos.