Quantitative Description of Critical Current Density in YBCO Films and Multilayers

Author

Pan, Alexey V. ; Pysarenko, Serhiy V. ; Dou, Shi X.

Author_Institution

Inst. for Supercond. & Electron. Mater., Univ. of Wollongong, Wollongong, NSW, Australia

Volume

19

Issue

3

fYear

2009

fDate

6/1/2009 12:00:00 AM

Firstpage

3391

Lastpage

3394

Abstract

The vortex pinning model based on the presence of the large number of edge dislocations in high quality YBa₂Cu₃O₇ (YBCO) films and multilayers has been refined. By introducing the pinning potential of a chain of individual edge dislocations, we have been able not only to describe the critical current density dependence on the applied magnetic field over its entire range, but also to extract the microstructural parameters in the films, such as inter-dislocation spacing and average domain size, without employing sophisticated microstructural analysis. The model applicability and its results have been verified with the help of microstructural characterization combined with magneto-optical imaging in YBCO films and multilayers with different properties.

Keywords

barium compounds; critical current density (superconductivity); crystal microstructure; edge dislocations; flux pinning; high-temperature superconductors; magnetic field effects; multilayers; superconducting thin films; yttrium compounds; YBa₂Cu₃O₇; applied magnetic field; critical current density dependence; domain size; edge dislocations; interdislocation spacing; magneto-optical imaging; microstructural parameters; multilayers; quantitative description; superconducting films; vortex pinning potential model;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2009.2018265

Filename

5153250