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Researchers at the University of Rochester, New York State (USA) published their experiments in Nature (Evidence of near-ambient superconductivity in a N-doped lutetium hydride) earlier this year after another paper of theirs, also published in Nature two years ago (Room-temperature superconductivity in a carbonaceous sulfur hydride), with tests on a sulfur-carbon hydride, had seen a RETRACTION notice placed in the journal in the face of comments from other researchers who were unable to reproduce it.
The subject of superconductors at affordable ambient conditions is popularly known as the scientists' quest for the "holy grail": in this News section, we have recently discussed it (https://www.revistadyna.com/noticias-de-ingenieria/la-busqueda-de-superconductividad-a-temperaturas-cada-vez-mas-elevadas) in the year 2022. In addition to the current metal alloys, already in use, such as those known as YBCO, yttrium, barium and copper oxides, which are available at temperatures of around 100ºK, different hydrides have been added, which seem to be taking positions on the research path.
In this case, the material was obtained by placing a sample of pure lutetium in a mixture of 99% hydrogen and 1% nitrogen, leaving them to react for three days at 200ºC. Subsequently, the material was compressed in a diamond press and conductivity tests were carried out up to the aforementioned pressure at which superconductivity was achieved. The process is made public so that other researchers can reproduce it and confirm its feasibility. Lutetium is a material belonging to the "rare earth" group, to which yttrium also belongs and which is used in current alloys.
The most important properties of superconducting materials are the disappearance of electrical resistance and the creation of very powerful magnetic fields. This could allow the creation of electrical grids that currently lose millions of MWh in the form of heat, and make it easier to design enclosures for magnetic confinement of the plasma in the "tokamak" of nuclear fusion power plants. Not to mention many other applications in medical devices using magnetoscopy, magnetic levitation trains or electronics in general.
NOTE: Absence of near-ambient superconductivity in LuH2±xNy (https://doi.org/10.48550/arXiv.2303.08759), published by Cornell University.