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Automated manufacturing of segmented nanowires with thin ferromagnetic layers: a step towards miniature SFS Josephson junctionsстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Sotnichuk Stepan V., Skryabina Olga V., Kushnir Sergey E., Khmelenin Dmitry N., Bakurskiy Sergey V., Stolyarov Vasily S., Napolskii Kirill S.
- Журнал: Journal of Materials Chemistry С
- Год издания: 2025
- Издательство: Royal Society of Chemistry
- Местоположение издательства: United Kingdom
- DOI: 10.1039/d4tc04751f
- Аннотация: Superconducting electronics is a rapidly growing field in micro- and nanoelectronics. Various planarstructures, such as Josephson junctions, exhibit intriguing phenomena with potential applications in spinbased and quantum devices. However, the integration density of these thin-film digital components is still lower than that of semiconductor elements. The nanometer-scale miniaturization of Josephson junctions can be achieved by using a new approach, such as nanowire-based geometry. This article reports an automated electrochemical method for producing segmented Au/Ni/Au nanowires with diameters less than 100 nm. The potentiostatic electrodeposition of metals from different baths using coulometric control leads to the formation of segments with narrow length distributions and well-defined boundaries. The ability to fabricate coarse-grained gold segments and single-crystal ferromagnetic nickel layers as thin as 7 nm has been demonstrated. For a nanowire-based Nb/Au/Ni/Au/Nb hybrid structure with planar Nb electrodes and a 7-nm-thick Ni segment, a critical current of 0.6 mA at 1.2 K has been detected. The lowtemperature transport properties are described by an effective resistance model, in which the Ni ferromagnetic layer exhibits ballistic electron transport. The fabricated structures represent the first example of miniature SFS Josephson junctions based on individual segmented nanowires that demonstrate proximity-induced superconducting behavior. These findings pave the way for designing compact, F-containing digital devices for superconducting nanoelectronics and spintronics.
- Добавил в систему: Бакурский Сергей Викторович
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