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MAGNETIC CHARACTERIZATION OF THE MELT-PROCESSED YBA2CU3O7 AND BI1.8PB0.2SR2CACU2OX SUPERCONDUCTORSстатья
Информация о цитировании статьи получена из
Scopus,
Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 9 ноября 2013 г.
- Авторы: KAZIN P.E., JANSEN M., WAGNER N., TRETYAKOV Yu D., LEE S.R., PUTLAYEV V.I., TESKER A.M.
- Журнал: Physica C: Superconductivity and its Applications
- Том: 211
- Номер: 1-2
- Год издания: 1993
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 227
- Последняя страница: 233
- DOI: 10.1016/0921-4534(93)90745-C
- Аннотация: Field and temperature dependence of the magnetization, remanent magnetic moment relaxation and AC susceptibility studies have been performed for the quench and melt growth (at different solidification speeds) processed YBa2Cu3O7 (123) species with different microstructures, and for the Bi1.8Pb0.2Sr2CaCu2O8 sample, prepared by crystallization from the glass. The Bi-containing superconductor reveals granular behavior with intragrain J(c) approximately 10(6) A/cm2 and intergrain J(c) approximately 10(3) A/cm2 at 4.5 K with possible enhanced critical current density in grain agglomerations. YBa2Cu3O7 samples exhibit a weak link free character with a magnetically estimated J(c) of about 10(5) A/cm2 at 10 K 10(3)-10(4) A/cm2 at 77 K. Peculiarities in magnetization loops and AC susceptibility curves have been attributed to the contributions to the magnetic response from the superconducting areas with different extensions. The temperature behavior of the flux creep activation energy is consistent with the assumption that in the Bi-containing superconductor there is a large amount of pinning centers with only a low pinning potential, while in the 123 material there is a wide distribution in the pinning energy. The highest J(c) and pinning characteristics have been obtained for an YBa2Cu3O7 sample, prepared using the highest 123 phase crystallization speed (100 K/h).
- Добавил в систему: Путляев Валерий Иванович