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Critical currents and order-disorder phase transition in the vortex states of YBa2Cu4O8 with chemically introduced disorderстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 29 мая 2015 г.
- Авторы: Angst M., Kazakov S.M., Karpinski J., Wisniewski A., Puzniak R., Baran M.
- Журнал: Physical Review B
- Том: 65
- Номер: 9
- Год издания: 2002
- Издательство: American Physical Society
- Местоположение издательства: United States
- Первая страница: 094518
- DOI: 10.1103/PhysRevB.65.094518
- Аннотация: A series of YBa2-xSrCu4O8 single crystals was measured to study the influence of site disorder on the transition line H-ss(T) between quasiordered vortex lattice and highly disordered vortex glass, as well as on the maximum critical current density within the glass phase, j(c)(max). When 32% of Ba is replaced by Sr, j(c)(max) is an order of magnitude higher than in the unsubstituted compound. In contrast, the transition field H-ss first drops by a factor of about 5 with a substitution of just 10% of Sr for Ba, and then remains approximately constant for higher Sr contents. Our results indicate that in very clean systems the order-disorder transition is affected very strongly by any crystallographic disorder, while above a certain threshold it is relatively robust with respect to additional disorder. In all substituted crystals H-ss decreases monotonically with an increase of temperature.
- Добавил в систему: Казаков Сергей Михайлович