We present measurements of the real part of the microwave resistivity at 48 GHz in YBa 2 Cu 3 O 7–delta and Bi 2 Sr 2 CaCu 2 O 8+x films, as a function of the temperature and of the static magnetic field. In zero field, the resistivity above the critical temperature is well described by the frequency-dependent fluctuational excess conductivity. In a static magnetic field and below T c , the resistivity in YBa 2 Cu 3 O 7–delta can be fully described by a simple flux-flow model, while in Bi 2 Sr 2 CaCu 2 O 8+x this model applies only partially. We discuss possible alternative models.
Flux Flow and Fluctuation Resistivity at 48 GHz in High-Tc Superconductors / Silva, E; Fastampa, Renato; Giura, Maurizio; Marcon, R; Neri, D; Sarti, Stefano. - In: JOURNAL OF LOW TEMPERATURE PHYSICS. - ISSN 0022-2291. - STAMPA. - 117:(2000), pp. 1501-1501. [10.1023/A:1022574623879]
Flux Flow and Fluctuation Resistivity at 48 GHz in High-Tc Superconductors
FASTAMPA, Renato;GIURA, Maurizio;SARTI, Stefano
2000
Abstract
We present measurements of the real part of the microwave resistivity at 48 GHz in YBa 2 Cu 3 O 7–delta and Bi 2 Sr 2 CaCu 2 O 8+x films, as a function of the temperature and of the static magnetic field. In zero field, the resistivity above the critical temperature is well described by the frequency-dependent fluctuational excess conductivity. In a static magnetic field and below T c , the resistivity in YBa 2 Cu 3 O 7–delta can be fully described by a simple flux-flow model, while in Bi 2 Sr 2 CaCu 2 O 8+x this model applies only partially. We discuss possible alternative models.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
