A1 Refereed original research article in a scientific journal
The Angular Dependence of the Critical Current of BaCeO3 Doped YBa2Cu3O6+x Thin Films
Authors: Malmivirta M, Yao LD, Inkinen S, Huhtinen H, Palonen H, Jha R, Awana VPS, van Dijken S, Paturi P
Publisher: IEEE-INST Electrical Electronics Engineers INC
Publication year: 2015
Journal: IEEE Transactions on Applied Superconductivity
Journal name in source: IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
Journal acronym: IEEE Trans Appl Supercond
Article number: ARTN 6603305
Volume: 25
Issue: 3
Number of pages: 5
ISSN: 1051-8223
DOI: https://doi.org/10.1109/TASC.2014.2376037
The angular dependencies of the critical current of BaCeO3 (BCO) doped YBa2Cu3O6+x (YBCO) thin films grown with pulsed laser deposition (PLD) on SrTiO3 (001) were systematically investigated. The BCO concentration in the YBCO matrix was varied between 0-8 wt.%. Transmission electron microscopy confirmed that the 4% BCO containing sample has point-like, partly agglomerated BCO particles with diameter of 2.5 nm. The dopant degrades the crystal quality of YBCO but improves its in-field current carrying performance especially at low temperatures. The BCO addition affects the angular dependence of the critical current by broadening the B parallel to ab-axis peak of YCBO but no c-axis peak is seen, which is contrary to BaZrO3 doped films made by PLD. Although the particles are point-like, it is found that a model featuring only isotropic pinning centers is not sufficient to describe the angular dependence of the samples where B parallel to ab-axis of YCBO.
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