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 SM ISO690:2012KHAYDUKOV, Yu N., MORARI, Roman, SOLTWEDEL, Olaf, KELLER, Thomas, CHRISTIANI, Georg, LOGVENOV, Gennadii Yu., KUPRIYANOV, Mihail, SIDORENKO, Anatolie, KEIMER, Bernhard. Interfacial roughness and proximity effects in superconductor/ferromagnet CuNi/Nb heterostructures. In: Journal of Applied Physics, 2015, vol. 118, p. 0. ISSN 0021-8979. DOI: https://doi.org/10.1063/1.4936789 |
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  Journal of Applied Physics |
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| Volumul 118 / 2015 / ISSN 0021-8979 /ISSNe 1089-7550 | |
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| DOI:https://doi.org/10.1063/1.4936789 | |
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We report an investigation of the structural and electronic properties of hybrid superconductor/ferromagnet (S/F) bilayers of composition Nb/Cu60Ni40 prepared by magnetron sputtering. X-ray and neutron reflectometry show that both the overall interfacial roughness and vertical correlations of the roughness of different interfaces are lower for heterostructures deposited on Al2O3(1 1 ¯ 02) substrates than for those deposited on Si(111). Mutual inductance experiments were then used to study the influence of the interfacial roughness on the superconducting transition temperature, TC. These measurements revealed a ∼4% higher TC in heterostructures deposited on Al2O3, compared to those on Si. We attribute this effect to a higher mean-free path of electrons in the S layer, caused by a suppression of diffusive scattering at the interfaces. However, the dependence of the TC on the thickness of the ferromagnetic layer is not significantly different in the two systems, indicating a weak influence of the interfacial roughness on the transparency for Cooper pairs. |
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| Cuvinte-cheie aluminum, Electronic properties, inductance, Interfaces (materials), Superconducting materials |
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DataCite XML Export
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