Microwave response of YBaCuO thin‐film Dayem bridges

Autor:	R. J. E. Jansen, M. A. M. Gijs
Rok vydání:	1990
Předmět:	Josephson effect Superconductivity Surface coating Materials science High-temperature superconductivity Physics and Astronomy (miscellaneous) Condensed matter physics law Grain boundary Thin film Electric current Microwave law.invention
Zdroj:	Applied Physics Letters. 56:1484-1486
ISSN:	1077-3118 0003-6951
DOI:	10.1063/1.103210
Popis:	1‐μm‐wide Dayem bridges were patterned with a pulsed Xe laser in c‐axis‐oriented YBaCuO films prepared according to the BaF2 method. The microbridges have a critical current density of 2×106 A/cm2 at 77 K, which is typical for an epitaxial film without grain boundaries. When microwave radiation in the centimeter wavelength range is applied, we observe current steps in the current‐voltage characteristic up to 72 K. The dependence of these steps on microwave power is compared with the model of Golovashkin and Lykov {Zh. Eksp. Teor. Fiz. 74, 214 (1978) [Sov. Phys. JETP 47, 110 (1978)]}; we find that the step amplitude is smaller than predicted.
Databáze:	OpenAIRE
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