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[not an expert but...]It shows strong diamagnetism(being repelled by both of the poles of a magnet), which is a property of superconductors. Not necessarily a s
by mrtksn 3y ago
[not an expert but...]It shows strong diamagnetism(being repelled by both of the poles of a magnet), which is a property of superconductors. Not necessarily a superconductor though, that’s still to be established but at least it shows that the inventors are up to something and it’s not complete fabrication.
- RyEgswuCsn 3y agoI am no expert on this topic, but I feel this is similar to how ferrofluid forms "spikes" when placed near a magnet. Are they related?
- mrtksn 3y agoI'm not an expert too but AFAIK ferrofluids are actually attracted by magnets. The spikes are probably as a result of having strong and weak locations of magnetic field and the the liquid rushing into those. But yes, Maybe I'm interpreting the video wrongly. Yet, to me it looks like the bulky part of the sample is being repelled by both poles of the magnet as it stands upright with the pointy end at the bottom each time. IMHO if this was due to attraction, the pointy end would be at the top.
- Nmi2osv7 3y agoNo. The spikes are pulled toward the magnet (ferromagnetism) whereas superconductivity is repelled by the magnet (diamagnetism.)
- bilsbie 3y agoWhy don’t they try heating it and seeing if the effect goes away? You could even try a welding torch or something.
- norturnn 3y agoThere are better, less destructive ways to test the transition temperature. Apparently LK-99 is hard to make in bulk, so they probably don't want to torch their sample.
- dylan604 3y agoor just stick it outside in a heat dome? don't you have one near you?
- lost_tourist 3y agolol or a temperature chamber that the vast majority of labs have? heck I made a toaster oven that will go anywhere from 100F to 400F with an arduino and a $3 toaster oven from the junk store.
- SimbaOnSteroids 3y agoNot only is it a purported to be a room temperature super conductor, it's a relatively high temperature superconductor, not guarantee the effect goes away if you put it under a torch.
- geon 3y agoI think the critical temperature was 400 K (127 °C).
- proto_lambda 3y agoAs far as I can tell, 127°C is just the highest temperature it was tested at. The critical temperature may be higher.
- sfink 3y agoThe original preprint said at least 400K. They didn't find an upper limit. And for some reason, they don't seem to have the standard impulse of "hey, our potentially revolutionary material that we've been working on for 20 years seems to actually be working. Let's check what happens when we set it on fire!"
- dfox 3y agoThe updated preprint gives Tc of 104.8 degC. I am not a material scientist and do not know much about superconductors, but cursory glance on some of the charts in the paper suggests that the real Tc of sample they measured is somewhat lower that that, but still well above room temperature.
- Palpatineli 3y agoThat’s a stretch. Dias’ material has real color change under high pressure which is an expected property of superconductors but nobody would argue his paper was not complete fabrication