A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Modeling reduced field dependence of critical current density in YBa2Cu3O6+x films with nanorods
Tekijät: Palonen H, Jäykka J, Paturi P
Kustantaja: AMER PHYSICAL SOC
Julkaisuvuosi: 2012
Journal: Physical Review B
Tietokannassa oleva lehden nimi: PHYSICAL REVIEW B
Lehden akronyymi: PHYS REV B
Numero sarjassa: 2
Vuosikerta: 85
Numero: 2
Aloitussivu: 1
Lopetussivu: 7
Sivujen määrä: 7
ISSN: 1098-0121
DOI: https://doi.org/10.1103/PhysRevB.85.024510
Tiivistelmä
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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