Reentrant superconductivity in superconductor-ferromagnetic-alloy bilayers

Zdravkov, V.; Sidorenko, A.; Obermeier, G.; Gsell, S.; Schreck, M.; MГјller, C.; Ryazanov, V.; Horn, S.; Tidecks, R.; Tagirov, L.; Kupriyanov, M.

Авторы: Zdravkov V., Sidorenko A., Obermeier G., Gsell S., Schreck M., MГјller C., Ryazanov V., Horn S., Tidecks R., Tagirov L., Kupriyanov M.
Журнал: Bulletin of the Russian Academy of Sciences: Physics
Том: 72
Год издания: 2008
Издательство: Allerton Press Inc.
Местоположение издательства: United States
Первая страница: 144
Последняя страница: 147
DOI: 10.1007/s11954-008-2002-7
Аннотация: Oscillating behavior of superconductivity in ultrathin bilayers of niobium and ferromagnetic alloy Cu41Ni59 has been observed. This phenomenon was most pronounced at a Nb layer thickness of about 7.3 nm: the superconducting transition temperature T c first sharply decreased with an increase in the ferromagnetic alloy thickness to complete suppression of superconductivity at the ferromagnetic alloy thickness d CuNi ≈ 4 nm. With a further increase in the thickness d CuNi, the superconductivity was restored at d CuNi ≥ 13 nm. This strongly nonmonotonic and reentrant behavior of superconductivity in Nb/Cu41Ni59 bilayers is attributed to implementation of a state in the ferromagnetic alloy that is similar to the quasi-one-dimensional Fulde-Ferrell-Larkin-Ovchinnikov state. Original Russian Text © V.I. Zdravkov, A.S. Sidorenko, G. Obermeier, S. Gsell, M. Schreck, C. Müller, V.V. Ryazanov, S. Horn, R. Tidecks, L.R. Tagirov, M.Yu. Kupriyanov, 2008, published in Izvestiya Rossiiskoi Akademii Nauk. Seriya Fizicheskaya, 2008, Vol. 72, No. 2, pp. 162–164.
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