myrrdyn writes to tell us that a new superconductivity record high of 254 Kelvin (-19C, -2F) has been recorded. According to the article this is the first time a superconductive state has been observed at a temperature comparable to a household freezer. "This achievement was accomplished by combining two previously successful structure types: the upper part of a 9212/2212C and the lower part of a 1223. The chemical elements remain the same as those used in the 242K material announced in May 2009. The host compound has the formula (Tl4Ba)Ba2Ca2Cu7Oy and is believed to attain 254K superconductivity when a 9223 structure forms"
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