A1 Refereed original research article in a scientific journal
Modeling reduced field dependence of critical current density in YBa2Cu3O6+x films with nanorods
Authors: Palonen H, Jäykka J, Paturi P
Publisher: AMER PHYSICAL SOC
Publication year: 2012
Journal: Physical Review B
Journal name in source: PHYSICAL REVIEW B
Journal acronym: PHYS REV B
Number in series: 2
Volume: 85
Issue: 2
First page : 1
Last page: 7
Number of pages: 7
ISSN: 1098-0121
DOI: https://doi.org/10.1103/PhysRevB.85.024510(external)
Abstract
Flux pinning is still the main limiting factor for the critical current of the high-temperature superconductors in high fields. In this paper, we model the field dependence of the critical current in thin films with columnar defects aligned with the field. The characteristic shape of the critical current of the BaZrO3-doped YBa2Cu3O6+x thin films is reproduced and explained. The model is based on solving the Ginzburg-Landau equations with columnar defects present in the lattice. The size of the columnar defect is found to be of key importance in explaining the rounded shape of the critical current of the BaZrO3-doped YBa2Cu3O6+x thin films. It is also found that the size of the rod changes the long-range order of the vortex lattice.
Flux pinning is still the main limiting factor for the critical current of the high-temperature superconductors in high fields. In this paper, we model the field dependence of the critical current in thin films with columnar defects aligned with the field. The characteristic shape of the critical current of the BaZrO3-doped YBa2Cu3O6+x thin films is reproduced and explained. The model is based on solving the Ginzburg-Landau equations with columnar defects present in the lattice. The size of the columnar defect is found to be of key importance in explaining the rounded shape of the critical current of the BaZrO3-doped YBa2Cu3O6+x thin films. It is also found that the size of the rod changes the long-range order of the vortex lattice.
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