Influence of Adsorbed Organic Molecules on the Critical Parameters of HTSC Ceramics. Part II. Bi1.8Pb0.3Sr3-xCa1+xCu3Oz Treated with Phenidone
Materials Research Innovations
, E-ISSN: 1433-075X
Makarshin Lev L.
Parmon Valentine N.
Kravchenko Valentine S.
Bogolyubov Nikolay A.
Boreskov Institute of Catalysis, pr. Akad. Lavrenticva 5, Novosibirsk 630090, Russia
We suggest that the treatment of the bismuth HTSC ceramics with phenidone provides a chem. reaction between the ceramic surface and the chemisorbed org. mols. accompanied by the extn. of highly labile and weakly bound oxygen from the lattice of the superconducting ceramics. This is confirmed by the IR spectra which show that a phenidone mol. is chemisorbed by >N-H group, and new absorption bands belonging to oxypyrazole (the product of phenidone oxidn.) appear. Thus, an interaction of phenidone with labile oxygen of the bismuth HTSC ceramics occurs which provides changes to its electronic state and consequently, its superconducting properties.