Microwave measurements of the absorbed power in granular Y-Ba-Cu-O samples for temperatures in the range 1-50 K are reported. The hysteretic behaviors observed are attributed to the fluxon motion in the flux-creep regime. A calculation of the surface resistance, based on the hypothesis of validity of the Bean model and which qualitatively explains the experimental results, is given. The potential of the surface-resistance measurement technique at microwave frequencies to detect various types of losses (flux creep, flux flow, and Josephson-junction dephasing) is discussed.
Giura, M., Marcon, R., Fastampa, R., Silva, E. (1992). FLUX-CREEP DISSIPATION IN Y-BA-CU-O SUPERCONDUCTORS AT MICROWAVE-FREQUENCIES. PHYSICAL REVIEW. B, CONDENSED MATTER, 45(13), 7387-7391 [10.1103/PhysRevB.45.7387].
FLUX-CREEP DISSIPATION IN Y-BA-CU-O SUPERCONDUCTORS AT MICROWAVE-FREQUENCIES
SILVA, Enrico
1992-01-01
Abstract
Microwave measurements of the absorbed power in granular Y-Ba-Cu-O samples for temperatures in the range 1-50 K are reported. The hysteretic behaviors observed are attributed to the fluxon motion in the flux-creep regime. A calculation of the surface resistance, based on the hypothesis of validity of the Bean model and which qualitatively explains the experimental results, is given. The potential of the surface-resistance measurement technique at microwave frequencies to detect various types of losses (flux creep, flux flow, and Josephson-junction dephasing) is discussed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
