bsuirДоклады БГУИРDoklady BGUIR1729-76482708-0382БГУИРbsuir-1136Research ArticleЭЛЕКТРОНИКА, РАДИОФИЗИКА, РАДИОТЕХНИКА, ИНФОРМАТИКАELECTRONICS, RADIOPHYSICS, RADIOENGINEERING, INFORMATICSСВЕРХПРОВОДЯЩАЯ ПЛЕНКА ВО ВНЕШНЕМ ПЕРИОДИЧЕСКОМ МАГНИТНОМ ПОЛЕSuperconducting film in the external periodic magnetic fieldКушнирВ. Н.KushnirV. N.

Кушнир Василий Николаевич - д.ф.-м.н., ведущий научный сотрудник НИЛ 5.3

220013, г. Минск, ул. П. Бровки, 6

тел. +375-17-293-39-93

Kushnir Vasiliy Nikolayevich - D.Sci, leading researcher of SRL 5.3 of R&D department

220013, Republic of Belarus, Minsk, P. Brovka st., 6

tel. +375-17-293-39-93

vnkushnir@gmail.comПрищепаС. Л.PrischepaS. L.

д.ф.-м.н., профессор, профессор кафедры защиты информации

D.Sci, professor, full professor of information security department

Белорусский государственный университет информатики и радиоэлектроникиBelarusian state university of informatics and radioelectronics201806062019088187Copyright © Кушнир В.Н., Прищепа С.Л., 20192019Кушнир В.Н., Прищепа С.Л.Kushnir V.N., Prischepa S.L.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://doklady.bsuir.by/jour/article/view/1136

В работе разработана элементарная модель воздействия неоднородного внешнего магнитного поля на сверхпроводящий конденсат в тонкой пленке. Сформулирована и решена в диффузионном приближении микроскопической теории сверхпроводимости задача о критической амплитуде внешнего периодического магнитного поля. В рамках модели Гинзбурга – Ландау решена задача о критическом токе в тонкой пленке, находящейся в слабом внешнем периодическом магнитном поле. Объяснены температурные зависимости плотности критического тока, измеренные на структуре сверхпроводник/диэлектрик/ферромагнетик.

The elementary model of the superconducting state of a thin film in the nonuniform external magnetic field is developed. In the diffusive limit of the superconductivity microscopic theory, the problem of the critical amplitude of the periodic external magnetic field has formulated and solved. In the frame of Ginzburg – Landau model, the critical current problem for the thin film in the weak periodic external magnetic field has solved. The critical current temperature dependencies of the superconductor/insulator/ferromagnet structure have clarified.

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The authors declare that there are no conflicts of interest present.