When I worked in research for a large company, the discovery of the first HTSCs stimulated research into the RF properties of superconductors - type I and type II. Since there was a huge jump in Tc, we considered that room temperature superconductors were just around the corner. What we discovered was that the higher the Tc, the worse the usable qualities of the superconductor. Our estimate was that a RTSC would actually be no better than copper. Superconductors are only zero resistance at DC. There is a finite penetration of current in all superconductors for AC and RF. The closer you are to the Tc and the higher the Tc is, the more AC/RF resistance you have and the lower the critical magnetic field. Our conclusion was that the only superconductors that were useful over Cu for RF applications were deeply cooled Type I. I think that RTSCs will only have niche applications. But ... I would love to be surprised.
On Sun, Jul 11, 2021 at 3:02 PM Jones Beene <jone...@pacbell.net> wrote: > Well as this paper implies, the field of superconductivity is "heating up" > these days ..literally > > The prior story which may be very important on this point - and in the > relentless progress towards usable RTSC - room temperature > superconductivity - itself came out just a few weeks back > > > https://phys.org/news/2021-07-ternary-hydrides-lanthanum-yttrium-high-temperature.html > ' > > ... which is a high pressure but ambient temp (non cryogenic) > phenomenon... involving superhydrides ... which curiously could be related > to LENR and the Mills/Holmlid effect, if as I suspect the superhydrides are > found to be in highly redundant ground states (as an alternative to > pressurization) > > The holy grail of course would be a metal superhydride going into RTSC phase > at ambient pressure. > > This advance would revolutionized the economy in so may ways - it would be > the "next big thing" as they say. > > Does the "Berry phase" of this new theory help us to understand > superhydride RTSC ? > > It doesn't look that way so far. The whole thing could be little more than > hype if it does not illuminate RTSC. > > You have to worry when a PR firm releases a technical paper. > > > Kevin O'Malley wrote: > > > *A Super New Theory to Explain Superconductivity* > <https://freerepublic.com/focus/chat/3975166/posts> > *Journal of Superconductivity and Novel Magnetism ^ > <https://scitechdaily.com/a-super-new-theory-to-explain-superconductivity/> *| > 5 July 2021 | Hiroyasu Koizumi > >
