The First 200K Superconductor and a New Superconductor System

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15 October 2008
Superconductors.ORG
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Superconductors.ORG herein reports synthesis of the first 200K
superconductor in conjunction with the discovery of a new superconductor
system.

The 200K material is believed to have an intergrowth B212/1212C
structure, where B=11 and C=copper chain. This structure is shown below
left and has the chemical formula Sn6Ba4Ca2Cu10Oy. The general formula
for this new family of superconductors is SnxBa4Ca2Cu(x+4)Oy. Within
this new family, unit cells with 3 to 6 atoms of tin (x) have been found
to superconduct, with 6 atoms of tin producing a new record high Tc near
201 Kelvin.

[To read the full story and see the graphics, click the below link.]

http://www.superconductors.org/200K.htm