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Temperature and magnetic field dependence of the voltagein GaAs films with superconducting Ga grains |
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| Authors: | B L Willems D MJ Taylor J Fritzsche M Malfait J Vanacken V V Moshchalkov E Montoya G Van Tendeloo |
| Institution: | (1) INPAC-Institute for Nanoscale Physics and Chemistry, Nanoscale Superconductivity and Magnetism Pulsed Fields Group, Katholieke Universiteit Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium;(2) EMAT, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium |
| Abstract: | We have studied granular films consisting of nanoscale Ga droplets formed on GaAs films via a method of vacuum annealing to promote As evaporation. For temperatures and magnetic fields below the bulk Ga critical parameters, the samples are very sensitive towards external microwave radiation when two point voltage measurements are performed. Together with the observation of an oscillating magnetic field dependence of the voltage, a scenario in which the samples consist of Josephson-coupled loops seems to be the most likely one for explaining the obtained results. |
| Keywords: | PACS" target="_blank">PACS 74 78 -w Superconducting films and low-dimensional structures 74 81 Bd Granular melt-textured amorphous and composite superconductors |
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