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Ferromagnetic half levitation of LK-99-like synthetic samples

arxiv.org

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Re: Ferromagnetic half levitation of LK-99-like synthetic samples

#81

Post by lifthrasiir »

rurban wrote: post #77
lifthrasiir wrote: post #73

Earlier quoted context omitted.

There are at least 2 samples definitely produced: one in the original videos and another in the video released by Hyun-Tak Kim via nytimes which definitely look different. It is unclear if the sample sent to KENTECH for the analysis is the first sample or a fresh one. Young-Wan Kwon is also known to have his own sample (confirmed in MML 2023 sightings), but it is unclear whether it's distinct from other samples too.…

If you cite Korean (or Chinese or Japanese) names, please write them correct. There is no Hyun-Tak Kim, he is called Kim Hyun-Tak. Likewise Kwon Young-Wan. In Korean it's trivial to detect, in Chinese not so, in Japanese very hard.

These are just how they wrote their own names in arXiv papers [1]. I don't know about Young-Wan Kwon, but Hyun-Tak Kim is a research professor in US university and should have settled on that matter.

After all I'm also Korean and I prefer my name to be written as "Kang Seonghoon" (i.e. the surname first), but I often go pragmatic and use "Seonghoon Kang" instead in order to be consistent with others. I'm very much aware of this issue.

[1] https://arxiv.org/abs/2307.12008 and https://arxiv.org/abs/2307.12037

Re: Ferromagnetic half levitation of LK-99-like synthetic samples

#82

Post by NovaDudely »

drtz wrote: post #66
ldjkfkdsjnv wrote: post #38

I knew it was fake, there would have been a huge rise in the stock market. Financial markets would have sniffed this out. The market never lies. If anything, this was an obvious opportunity to short it on prediction markets.

> The market never lies. I suppose you weren't paying much attention in 2008.

That was probably the one time the market was being truthful before it all got pumped up again. Nothing to see here, move along!

Re: Ferromagnetic half levitation of LK-99-like synthetic samples

#83

Post by dotnet00 »

ldjkfkdsjnv wrote: post #38

I knew it was fake, there would have been a huge rise in the stock market. Financial markets would have sniffed this out. The market never lies. If anything, this was an obvious opportunity to short it on prediction markets.

The market isn't magic, it too would only rise with sufficient repeatable confirmation and indications of viability for mass production and application. After all, we do have knowledge of 'magic' materials like carbon nanotubes and graphene, and yet the stock market hasn't gone crazy over them.

Re: Ferromagnetic half levitation of LK-99-like synthetic samples

#84

Post by NovaDudely »

dylan604 wrote: post #44
NovaDudely wrote: post #37

Earlier quoted context omitted.

I have been very cautious on any analysis on LK99 - especially my own. I have mentioned to many people that any potential application of this stuff comes with an 'if it is real'. That IF is doing a lot of heavy lifting and it has to be emphasized. I want this to be a thing, but it doesn't matter how much you want something to be true, it actually HAS to be true. A beautiful elegant idea can be crushed by a single ugl…

[flagged]

There is always an exception to the rule and you found it!

Re: Ferromagnetic half levitation of LK-99-like synthetic samples

#85

Post by p-e-w »

So if good old ferromagnetism/diamagnetism is sufficient to explain the half-levitation shown in the video:

How can I build my own half-levitating objects from standard materials?

I've seen the science toys using pyrolytic carbon, but they are nowhere close to the effect from the video. Levitation height with pyrolytic carbon is like 1/20th of what the video demonstrates. The disc in the video looks like it's just about to take off. Can this be replicated with previously known materials at room temperature?

Re: Ferromagnetic half levitation of LK-99-like synthetic samples

#86

Post by throwawaymaths »

Jweb_Guru wrote: post #54
throwawaymaths wrote: post #28

Earlier quoted context omitted.

This is bad logic. Ferromagnetic explains half levitation but it doesn't explain full levitation. Superconductivity is sufficient to explain full levitation and half levitation. > Simply because ferromagnets are common Sure, metal ones are, but Are ceramic ferromagnets (without iron) common? That lone electron in an orbital is pretty important.

> Ferromagnetic explains half levitation but it doesn't explain full levitation No one reputable has actually demonstrated full levitation, including the original team. > Sure, metal ones are, but Are ceramic ferromagnets (without iron) common? That lone electron in an orbital is pretty important. They literally reproduced this behavior with a substance that looks identical to the original LK-99, so while it would be…

Never claimed it was impossible, just that it's rare.

> No one reputable

I don't care about reputability of anyone unless they have a known past of fraud. Gatekeeping in science is lame unless someone makes a claim to break well understood theory or claims to do something technically difficult. RTSC is neither.

Do you think this video is faked?:

https://twitter.com/Andercot/status/1687740396691185664?s=20

Re: Ferromagnetic half levitation of LK-99-like synthetic samples

#87

Post by haldujai »

lifthrasiir wrote: post #78
haldujai wrote: post #72

Earlier quoted context omitted.

Adding on to that: the researchers are from a private corporation that falsely claimed partnerships with several South Korean enterprises and universities which have all disavowed any connection, the "Quantum Energy Research Centre" website has gone private[edit: not suspicious as described in comments below] and the co-authors are apparently feuding over project direction with one of them since removed from the pape…

> the "Quantum Energy Research Centre" website has gone private In this particular case however, the website repeatedly hit the daily traffic quota before the closure. So I guess it would be no surprise that the hosting provider [1] forced them to close the website. [1] The website itself was probably hosted by https://imweb.me/ (the parking page also supports this observation---the asset path and the admin page path…

Interesting, so that's the expected parking page for such a situation?

I have no idea how web hosting works in SK and was going off this article, my interpretation was that this was changed after the traffic warning hence why I assumed malice:

While the company’s website previously displayed a message that it has been blocked due to excessive traffic, it has now been shut down altogether as of Thursday with a message saying that it is “under construction."

I guess that's one less red flag.

https://koreajoongangdaily.joins.com/2023/08/03/business/tec...

Edit:

Is the Safari translation of https://imweb.me/price correct in saying unlimited traffic is 24,000 won ($18 USD) per month?

If so, I'll add back that a private company that has discovered a room-temperature superconductor but is skimping out on $18/mo for web hosting does not inspire confidence.

Re: Ferromagnetic half levitation of LK-99-like synthetic samples

#88

Post by NovaDudely »

hliyan wrote: post #80

According to this: https://twitter.com/Andercot/status/1688598313497694208 "...there is a less well-known exception to this rule called Brauenbecker extension which provides a mathematical proof that levitation is possible with a simple diamagnetic in a dipole field so long as the diamagnetic material mass is very small relative to the strength of the magnetic field." I was very hopeful in the early days and was foll…

The best we can hope for is that there is some sort of SC properties that can be investigated further even if this is not the holy grail moment many wanted it to be.

Re: Ferromagnetic half levitation of LK-99-like synthetic samples

#89

Post by lamontcg »

I thought LK-99 looked like bullshit from the start, but the conclusions of this preprint should really be confirmed and there's still a lot they don't understand about the behavior of the sample that should get more fully explained. And there might be something with this material showing semiconductor like behavior that could still prove more mundanely useful.

Re: Ferromagnetic half levitation of LK-99-like synthetic samples

#90

Post by throwawaymaths »

Jweb_Guru wrote: post #46
jefftk wrote: post #22

Earlier quoted context omitted.

Couldn't there be solid evidence that the observed behavior was due to a different effect?

There is, a combination of strong (but not amazingly strong) diamagnetism at low field strengths and soft ferromagnetism (in floating samples) at high field strengths. Which is exactly what the paper in the link observed while getting the same results everyone else has. The only unambiguous sign of superconductivity was the original resistance graph which can apparently be explained by contact issues with four point…

Doesn't diamagnetic levitation require a specific arrangement of the permamagnets that is not recreated in these videos?
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