Patent ID: 7482298
Filing Date: 2009-01-27
Classification: H01L,Y10S

Abstract:
1. Superconductor compositions that are electrically conductive comprising a multiplicity of different species of atoms, characterized by having an Ne/χ value that is not a peak or near peak value of λ, where Ne is the average number of valence electrons in the composition, and χ is the absolute value of the electronegativity of the composition, and λ is the electron phonon coupling constant, wherein Ne/χ can be shifted to peak or near peak value by substitution or partial substitution of at least one of said species of atoms with an atomic species having and electronegativity different from at least one of said species of atoms which is being replaced by said substitution, said substitution resulting in a superconductive composition of matter wherein Ne/χ peak or near peak values include one of the following values: 0.465±0.005, 0.595±0.004, 0.655+0.001, −0.004, 0.69±0.003, 0.74±0.005, 0.848±0.001, 0.875±0.002, 0.91±0.002, 0.971±0.001, 1.015±0.002, 1.07±0.007, 1.12+0.004, −0.01, 1.17±0.008, 1.215±0.002, 1.28±0.005, 1.34±0.01, 1.36±0.002, 1.408±0.003, 1.45±0.003, 1.473±0.002, 1.508±0.002, 1.525±0.002, 1.578±0.002, 1.596±0.002, 1.642+0.005, −0.002, 1.704±0.005, 1.80+0.00, −0.005, 1.86+0.005−0.01, 1.97±0.02, 2.166±0.01, 2.16±0.01, 2.34±0.01 wherein the superconducting composition is a composition selected from the group consisting of Mg 0.80 Sc 0.10 Na 0.10 B 2 and Mg 0.88 Sc 0.06 Na0.06B 2 .