19 F NMR in the La-Sr-Cu-O(F) system
Kukovitskii E. F. , Medvedev L. I., Mustafin R. G., Telitel'baum G. B.
The effects of the substitution of fluorine for oxygen in a lanthanum-strontium superconductor have been studied. The fluorine nuclei undergo a relaxation through current carriers. The size of the superconducting gap is determined.