Thanks, can I scream my hype out, now?
No, still not... sorry.
Successful room temperature ambient-pressure magnetic levitation of LK-99
41–50 of 1001 posts
Re: Successful room temperature ambient-pressure magnetic levitation of LK-99
#42There have been quite a few papers about LK-99, but the only thing I want to see is whether we observer sudden drop of resistance to zero below the critical temperature that is well above the room temperature at ambient pressure or not. So far, I haven't seen one.
This can take a while. With the current fabrication process, they're only getting a chunk with LK-99 particles sprinkled in. Since nobody yet knows how to fabricate a pure chunk of LK-99, it'll be hard to measure the true resistance of LK-99.
Re: Successful room temperature ambient-pressure magnetic levitation of LK-99
#43Earlier quoted context omitted.
The paper shows a clear phase transition to diamagnetism as the material is cooled. That would be seen in superconductors and not in regular diamagnetic materials. I'm not aware of any that have that kind of phase transition. Though since we're in weird territory here, it's important to note some weird non-superconductor behavior that's beyond regular diamagnetism might be going on as an alternative explanation. But…
What temperature?
They got about 50 degrees C, but note that the bulk sample and the more pure tiny sample are different.
It definitely contributes to the general feel that however this works, it's an inefficient synthesis that's problematically generating the material we want.
It certainly makes me wonder if something like molecular-beam epitaxy would be able to directly grow a more pure sample (but I imagine that's expensive and time-consuming to setup, plus not really what we're hoping for if we want to use lots of it).
Re: Successful room temperature ambient-pressure magnetic levitation of LK-99
#44Why are folks trying to prove that this material is a superconductor in roundabout ways, like levitation, dimagnetism, etc? What is the reason they don't just test to see if electrical current flows without resistance? Surely there is something I am missing here.
With the current fabrication process, they're only getting a chunk with LK-99 particles sprinkled in. Since nobody yet knows how to fabricate a pure chunk of LK-99, it'll be hard to measure the true resistance of LK-99.
Re: Successful room temperature ambient-pressure magnetic levitation of LK-99
#45I'm not too familiar with this space. Could someone explain how big of an impact to the world this discovery is? What does the future of this technology look like over the next 5 years?
Re: Successful room temperature ambient-pressure magnetic levitation of LK-99
#46So, these folks replicated the material and it does highly unusual things, is that right ? It had seemed the fabrication process was still very dodgy and unreliable, this team got it to work independently?
Re: Successful room temperature ambient-pressure magnetic levitation of LK-99
#47>we successfully verify and synthesize the LK-99 crystals which can be magnetically levitated with larger levitated angle than Sukbae Lee's sample at room temperature. It is expected to realize the true potential of room temperature, non-contact superconducting magnetic levitation in near future. Aaaand we’re back! I’m really trying to remain (reasonably, not ideologically) skeptical but if this is legit this is a hu…
At this point, even if this doesn’t turn out to be the holy grail this seems like it would still be a very big step/promising avenue for research on the path right?
Re: Successful room temperature ambient-pressure magnetic levitation of LK-99
#48Earlier quoted context omitted.
The paper shows a clear phase transition to diamagnetism as the material is cooled. That would be seen in superconductors and not in regular diamagnetic materials. I'm not aware of any that have that kind of phase transition. Though since we're in weird territory here, it's important to note some weird non-superconductor behavior that's beyond regular diamagnetism might be going on as an alternative explanation. But…
What temperature?
326K (+127 deg F) and 340K (+152 deg F) for their less and more pure samples respectively. And, yes, if it's a superconductor as we understand them, that's the temperature at which it would have zero resistance as well.
Re: Successful room temperature ambient-pressure magnetic levitation of LK-99
#49I'm not too familiar with this space. Could someone explain how big of an impact to the world this discovery is? What does the future of this technology look like over the next 5 years?
If true, five years not that much difference. A few decades, large differences.
Re: Successful room temperature ambient-pressure magnetic levitation of LK-99
#50i wonder if this will become the next version of hopium, where we struggle to refine a material that can actually be used in a wide enough temperature range to operate outside.