Evaluation of the out-of-plane coherence length in (103)/(013) YBa 2Cu3O7-δ films from electrical transport measurements

C. Camerlingo, G. Jung

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

The out-of-plane plane coherence length ξc of YBa 2Cu3O7-δ superconductor has been evaluated by analysing the thermally activated magnetic vortex flux creep across superconducting CuO2 layers. Current flow along CuO2 layers has been ensured by patterning (103)/(013) oriented films into several macro-bridges positioned at different angles with respect to the crystalline planes. The bridge in which vortex creep occurs across the intrinsic potential of CuO2 layers has been selected on the basis of the superconducting transition and current-voltage characteristics. Current-voltage characteristics of the selected bridge were analysed in the framework of the theoretical model of Barone et al (1990 J. Supercond. 3 155), which accounts for a vortex creep in a periodic potential. The estimated out-of-plane coherence length ξc ranges between 0.11 and 0.30 nm for films with different oxygen and structural defect contents, consistently with values evaluated with different techniques and reported in the literature. The ξc value changes in different ways with changing critical temperature Tc, depending on the dominating type of oxygen vacancies and defects.

Original languageEnglish
Pages (from-to)1106-1111
Number of pages6
JournalSuperconductor Science and Technology
Volume18
Issue number8
DOIs
StatePublished - 1 Aug 2005

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