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RESEARCH PRODUCT

Superconductivity suppression in Fe-implanted thin Al films

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At present, ion implantation into metallic systems is given increasing attention, aiming at achieving properties and functionalities of technologically valuable materials not easily available via conventional techniques. In our experiments thin Al films were implanted with Fe ions in order to find out how the superconductive properties of the metal can be modified at will. The purpose was twofold, viz., first, to study the basic physics of superconductivity in low-dimensional metallic structures doped with impurities. The second purpose was to apply ion implantation for the suppression of undesired superconductivity in aluminum widely used for fabrication of micro- and nanodevices operated at low temperatures. In many applications transition to the superconductive state is detrimental for the device’s functionality, for instance, those based on Coulomb blockage (CB) effect (e.g., in CB thermometry).