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Magnetic test boosts case for record-setting superconductor

Meissner effect detected in relatively ‘warm’ hydrogen sulfide

By
8:30am, July 6, 2015

A promising material for conducting electrical current without resistance at a relatively high temperature has passed a crucial test. New magnetic measurements, detailed by German physicists in a study posted online June 26 at arXiv.org, indicate that pressurized hydrogen sulfide is a superconductor at roughly 200 kelvins.

The fresh data bolster the controversial claim of hydrogen sulfide superconductivity made by the same researchers in December (SN: 4/4/15, p. 11). If confirmed, the discovery would nudge physicists closer to their ultimate goal of room-temperature superconductivity (about 300 kelvins). No other known material is superconducting above 164 kelvins.

Mikhail Eremets, a high-pressure physicist at the Max Planck Institute for Chemistry in Mainz, Germany, and colleagues crushed hydrogen sulfide

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