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Neodymium nickel oxide: from metal to insulator
Some materials are blessed with somewhat surprising — and undoubtedly very useful — properties. Neodymium nickel oxide, for example, can be either a metal or an insulator, depending on its temperature. This characteristic makes the material a potential can…
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Superconductivity: a testing scenario
Superconductivity with a high critical temperature (high Tc) remains a theoretical mystery for the time being. Although the phenomenon has been observed in experiments, no scientist has yet succeeded in explaining how the mechanism works. In the 1990s, the…
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Superconductivity: all wound up by the Swiss
A Swiss team has made a 100 % superconducting coil that can reach a magnetic field of 25 teslas — a European first. Superconductivity is the focus of numerous studies in physics since its electronic characteristics permit lossless current transport and th…