We report on resistive transitions in YBCO films as a function of strength and orientation of the applied magnetic field. Angular behaviour is found to be markedly different in the upper and lower part of the transition. At high dissipation level, an angular scaling behaviour is observed, following the anisotropic Lawrence-Doniach expression for the upper critical field. The scaling breaks down at the midpoint of the transition. No scaling is observed at lower temperatures, even if different angular scaling functions are used. The results are very well interpreted in terms of superconducting fluctuations above rho/rho(n)=0.5 and pinning phenomena below.
Sarti, S., Boffa, V., Fastampa, R., Giura, M., Marcon, R., Silva, E. (1996). Anisotropic properties of the fluctuational conductivity in YBCO. CZECHOSLOVAK JOURNAL OF PHYSICS, 46(SUPPL. 3), 1383-1384 [10.1007/BF02562806].
Anisotropic properties of the fluctuational conductivity in YBCO
SILVA, Enrico
1996-01-01
Abstract
We report on resistive transitions in YBCO films as a function of strength and orientation of the applied magnetic field. Angular behaviour is found to be markedly different in the upper and lower part of the transition. At high dissipation level, an angular scaling behaviour is observed, following the anisotropic Lawrence-Doniach expression for the upper critical field. The scaling breaks down at the midpoint of the transition. No scaling is observed at lower temperatures, even if different angular scaling functions are used. The results are very well interpreted in terms of superconducting fluctuations above rho/rho(n)=0.5 and pinning phenomena below.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.