Effect of pinning and thermal fluctuations on the superconducting transition of YBa 2 Cu 3 O 7 very thin films (original) (raw)

Superconducting and Related Oxides: Physics and Nanoengineering III, 1998

Abstract

The complex ac sheet impedance of c-axis oriented YBa2Cu3O7 thin films was measured as a function of temperature in the frequency range 102Hz - 105 Hz for film thicknesses varying between 24 Angstrom and 1100 Angstrom. We present the measurements on the thinnest films and examine their consistency with the predictions from various models for the superconducting transition, in particular

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