Electron beam irradiation has been used to induce controllable variations in the properties of YBa2Cu3O7, biepitaxial grain boundary Josephson junctions. Electron irradiation decreased the critical current of the junctions Ic and increased the normal state specific resistivities. The junction parameters can be adjusted controllably by applying an appropriate dose. The original properties of the junctions could be partly restored by isothermal annealing A correlation between the transport properties and the microstructure was obtained by determining the ratio of a barrier thickness to the dielectric constant of the junctions with different barriers. The experiment also demonstrates frequency tunability in a resonant soliton oscillator. Preliminar results of irradiation on (103) YBCO films have been given demonstrating differences from data on c-axis films, as partly expected from the anisotropy of these materials.

Phenomenology of YBa2Cu3O7-x grain boundary Josephson junctions Irradiated by Electron beam irradiation

TAFURI, Francesco;
1999

Abstract

Electron beam irradiation has been used to induce controllable variations in the properties of YBa2Cu3O7, biepitaxial grain boundary Josephson junctions. Electron irradiation decreased the critical current of the junctions Ic and increased the normal state specific resistivities. The junction parameters can be adjusted controllably by applying an appropriate dose. The original properties of the junctions could be partly restored by isothermal annealing A correlation between the transport properties and the microstructure was obtained by determining the ratio of a barrier thickness to the dielectric constant of the junctions with different barriers. The experiment also demonstrates frequency tunability in a resonant soliton oscillator. Preliminar results of irradiation on (103) YBCO films have been given demonstrating differences from data on c-axis films, as partly expected from the anisotropy of these materials.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11591/200263
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