Anomalous magneto-resistance of Ni-nanowire/Nb hybrid system

O. V. Skryabina*, S. N. Kozlov, S. V. Egorov, A. A. Klimenko, V. V. Ryazanov, S. V. Bakurskiy, M. Yu Kupriyanov, N. V. Klenov, I. I. Soloviev, A. A. Golubov, K. S. Napolskii, I. A. Golovchanskiy, D. Roditchev, V. S. Stolyarov

*Corresponding author for this work

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Abstract

We examine the influence of superconductivity on the magneto-transport properties of a ferromagnetic Ni nanowire connected to Nb electrodes. We show experimentally and confirm theoretically that the Nb/Ni interface plays an essential role in the electron transport through the device. Just below the superconducting transition, a strong inverse proximity effect from the nanowire suppresses superconducting correlations at Nb/Ni interfaces, resulting in a conventional anisotropic magneto-resistive response. At lower temperatures however, the Nb electrodes operate as superconducting shunts. As the result, the magneto-resistance exhibits a strongly growing hysteretic behavior accompanied by a series of saw-like jumps. The latter are associated with the penetration/escape of individual Abrikosov vortices that influence non-equilibrium processes at the Nb/Ni interface. These effects should be taken into account when designing superconducting quantum nano-hybrids involving ferromagnetic nanowires.

Original languageEnglish
Article number14470
JournalScientific reports
Volume9
Issue number1
DOIs
Publication statusPublished - 9 Oct 2019

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    Skryabina, O. V., Kozlov, S. N., Egorov, S. V., Klimenko, A. A., Ryazanov, V. V., Bakurskiy, S. V., ... Stolyarov, V. S. (2019). Anomalous magneto-resistance of Ni-nanowire/Nb hybrid system. Scientific reports, 9(1), [14470]. https://doi.org/10.1038/s41598-019-50966-8