Interference No. 101,981
Beyers and Qadri therefore define the count as containing
90% of a species of orthorhombic AB 2Cu3Oy where y is approximately
7.0. This is the narrow interpretation of the count.
Batlogg (BaB 29), on the other hand, has a broader
interpretation:
[. . .] the count demands that the composition be at least
90% orthorhombic 1-2-3. The oxygen content must be such that
the composition has zero electrical resistance at 70°K or
above. These conditions can be readily verified by common
laboratory techniques, namely x-ray diffraction and
resistance measurements. The count could not possibly require
that at least 90% of the composition be of the “Ortho I”
variety since, inter alia, there exist no readily available
techniques for ascertaining existence of this condition, and
since there is no support for this interpretation in any of
the involved applications.
We can summarize the positions of the parties (i.e., the
gray boxes) as follows:
Chu (prior art) Batlogg Beyers/Qadri
A2B1Cu3O
green – superconducting
tetrahedral
y#6.3 – superconducting
A1B2Cu3Oy orthorhombic (ortho II)
black y=6.4-7.0 y=6.4-6.8 superconducting <70°K
(ortho I)
y=6.9-7.0 superconducting >70°K
22
Page: Previous 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 Next
Last modified: November 3, 2007