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Comparison of the influence of carbon substitution and neutron-induced defects on the upper critical field and flux pinning in MgB 2 single crystalsстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
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Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Wisniewski A., Puzniak R., Judek J., Krutzler C., Eisterer M., Weber H.W., Jun J., Kazakov S.M., Karpinski J.
- Журнал: Superconductor Science and Technology
- Том: 20
- Номер: 3
- Год издания: 2007
- Издательство: IOP Publishing
- Местоположение издательства: [Bristol, UK], England
- Первая страница: 256
- Последняя страница: 260
- DOI: 10.1088/0953-2048/20/3/025
- Аннотация: The superconducting properties of pure and carbon-substituted MgB 2 single crystals were studied prior to and after fast neutron irradiation. The C substitution significantly enhances the upper critical field H c2. In comparison with an unsubstituted crystal, H c2 parallel to the c-axis in Mg(B 0.948C 0.052) 2, e.g.at 15K, is enhanced by a factor of about 2 and the H c2 anisotropy is reduced. After fast neutron irradiation very pronounced changes in flux pinning are observed, both for the pure and for the substituted crystal, and the impact of the induced defects on the critical current density is significantly stronger than that of substitution. On the other hand, the changes in H c2 of the carbon-substituted crystal are much more pronounced than those caused by irradiation. The observed changes in H c2 can be explained by taking the characteristic length scale of the defects introduced by C substitution and by neutron irradiation into account. © IOP Publishing Ltd.
- Добавил в систему: Казаков Сергей Михайлович