The lack of scaling of flux pinning forces found in some superconductors is discussed. As examples, data from three systems of superconductors is analysed: (1) Nb3Ge and pseudobinaries based on Nb3Ge made by chemical-vapour deposition; (2) sputtered Chevrel-phase films of PbMo6S8; and (3) sputtered Chevrel-phase films of CuzMo6S8(1·6 ≤ x ≤ 2·5). The lack of scaling in all three systems is explained by assuming sample inhomogeneity. Moreover, it is found that modified scaling laws are quantitatively obeyed if redefined pinning forces or redefined magnetic fields are used. The redefining procedure depends on the nature of the inhomogeneity particular to each if the three systems investigated.
|Original language||English (US)|
|Number of pages||16|
|Journal||Philosophical Magazine B: Physics of Condensed Matter; Statistical Mechanics, Electronic, Optical and Magnetic Properties|
|State||Published - Dec 1978|
ASJC Scopus subject areas
- Chemical Engineering(all)
- Physics and Astronomy(all)