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Hints of a new superconductor champion.

Hints of a new superconductor champion

By combining thallium, strontium, vanadium and oxygen, Shin-Pei Matsuda and co-workers at the Superconductivity Research Group of Hitachi, Ltd., in Ibaraki, Japan, have cooked up a new ceramic material that they claim becomes superconducting at a record high temperature of 130 kelvins. The previous record holder for a high-temperature superconductor -- a compound of thallium, barium, calcium, copper, and oxygen -- shed all resistance at 122 K.

Though the Hitachi results are preliminary, "you have to take them seriously," notes physicist Mildred S. Dresselhaus at the Massachusetts Institute of Technology in Cambridge. Because copper has played prominent roles in previous high-temperature superconductors, she said its absence in the new compound may yield clues explaining these materials' tantalizing and still mysterious properties.
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Publication:Science News
Date:Oct 13, 1990
Words:125
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