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Magnetoresistivity of thin YBa2Cu3O7−δ films on sapphire substrate


Probst, Petra; Il’in, Konstantin; Engel, Andreas; Semenov, Alexei; Hübers, Heinz-Wilhelm; Hänisch, Jens; Holzapfel, Bernhardt; Siegel, Michael (2012). Magnetoresistivity of thin YBa2Cu3O7−δ films on sapphire substrate. Physica C: Superconductivity, 479:173-175.

Abstract

Magnetoresistivity of YBa2Cu3O7−δ films with thicknesses between 7 and 100 nm deposited on CeO2 and PrBa2Cu3O7−δ buffer layers on sapphire substrate has been measured to analyze the temperature dependence of the second critical magnetic field Bc2. To define Bc2, the mean-field transition temperature Tc was evaluated by fitting the resistive transition in zero magnetic field with the fluctuation conductivity theory of Aslamazov and Larkin. At T → Tc the Bc2(T) dependence shows a crossover from downturn to upturn curvature with the increase in film thickness.

Abstract

Magnetoresistivity of YBa2Cu3O7−δ films with thicknesses between 7 and 100 nm deposited on CeO2 and PrBa2Cu3O7−δ buffer layers on sapphire substrate has been measured to analyze the temperature dependence of the second critical magnetic field Bc2. To define Bc2, the mean-field transition temperature Tc was evaluated by fitting the resistive transition in zero magnetic field with the fluctuation conductivity theory of Aslamazov and Larkin. At T → Tc the Bc2(T) dependence shows a crossover from downturn to upturn curvature with the increase in film thickness.

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Additional indexing

Item Type:Journal Article, not refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2012
Deposited On:31 Jan 2013 15:43
Last Modified:05 Apr 2016 16:25
Publisher:Elsevier
ISSN:0921-4534
Publisher DOI:https://doi.org/10.1016/j.physc.2011.12.024

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