SUPERCONDUCTIVITY is creating a buzz again with the announcement of a new
material that is said to have zero electrical resistance at room temperature.
The claim, from researchers in Croatia, comes just a few weeks after the
discovery that the simple chemical magnesium diboride superconducts at temperatures
up to almost twice those needed for other metallic superconductors to work
(Â鶹´«Ã½, 3 March, p 6).
The Croatian scientists say that current will flow effortlessly through their
material, a mixture of lead carbonate and lead and silver oxides, at up to about
30 °C. “These results are suggestive of a…
