Publication:
Modification of Pinning in YBa2Cu3O7 Thin Films by Substrate Annealing

Дата
2019
Авторы
Jones, Antony
Lam, Simon K.
Du, Jia
Rubanov, Sergey
Pan, Alexey V.
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Научные группы
Организационные подразделения
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Институт лазерных и плазменных технологий
Стратегическая цель Института ЛаПлаз – стать ведущей научной школой и ядром развития инноваций по лазерным, плазменным, радиационным и ускорительным технологиям, с уникальными образовательными программами, востребованными на российском и мировом рынке образовательных услуг.
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Аннотация
To improve the usefulness of superconducting devices the critical current density (J(c)) often needs to be improved or modified. This can simply be done by increasing the amount of defects present, allowing more magnetic flux to be trapped. These defects can he introduced artificially after deposition by use of for instance controlled holes throughout the surface (antidots), or prior to deposition by manipulating the procedure or substrate type/surface. In this paper, LaAlO3 substrates were annealed at 1000 degrees C for 2 h prior to deposition of approximately 250 nm of YBa2Cu3O7. Across several depositions, on average the J(c) of the annealed substrate film is improved similar to 10-15% relative to a plain substrate film. Aside from a J(c) enhancement, the annealed substrate samples were found to have a much higher consistency between depositions, particularly at lower applied magnetic fields. Furthermore, ion beam etching is often required on the substrate for fabrication of superconducting devices. This paper has shown that annealing can restore the substrate surface to the same quality as the manufactured plain substrate, based on the very similar J(c) values.
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Цитирование
Modification of Pinning in YBa2Cu3O7 Thin Films by Substrate Annealing / Jones, Antony [et al.] // IEEE Transactions on Applied Superconductivity. - 2019. - 29. - № 5. - 10.1109/TASC.2019.2897457
URI
https://www.doi.org/10.1109/TASC.2019.2897457
 https://www.scopus.com/record/display.uri?eid=2-s2.0-85062604530&origin=resultslist
 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000460689500001
 https://openrepository.mephi.ru/handle/123456789/16634
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