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Proximity effect in [Nb(1.5 nm)/Fe(x)]10/Nb(50 nm) superconductor/ferromagnet heterostructuresстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 7 октября 2020 г.
- Авторы: Khaydukov Yury, Pütter Sabine, Guasco Laura, Morari Roman, Kim Gideok, Keller Thomas, Sidorenko Anatolie, Keimer Bernhard
- Журнал: Beilstein journal of nanotechnology
- Том: 11
- Год издания: 2020
- Издательство: Beilstein-Institut zur Förderung der Chemischen Wissenschaften
- Местоположение издательства: Frankfurt am Main, Germany
- Первая страница: 1254
- Последняя страница: 1263
- DOI: 10.3762/bjnano.11.109
- Аннотация: We have investigated the structural, magnetic and superconduction properties of [Nb(1.5 nm)/Fe(x)]10 superlattices deposited on a thick Nb(50 nm) layer. Our investigation showed that the Nb(50 nm) layer grows epitaxially at 800 °C on the Al2O3(1−102) substrate. Samples grown at this condition possess a high residual resistivity ratio of 15–20. By using neutron reflectometry we show that Fe/Nb superlattices with x < 4 nm form a depth-modulated FeNb alloy with concentration of iron varying between 60% and 90%. This alloy has weak ferromagnetic properties. The proximity of this weak ferromagnetic layer to a thick superconductor leads to an intermediate phase that is characterized by a suppressed but still finite resistance of structure in a temperature interval of about 1 K below the superconducting transition of thick Nb. By increasing the thickness of the Fe layer to x = 4 nm the intermediate phase disappears. We attribute the intermediate state to proximity induced non-homogeneous superconductivity in the structure.
- Добавил в систему: Хайдуков Юрий Николаевич