Flux Pinning Properties in YBa2Cu3Oy Films with BaSnO3 Nano-rods and Spatially-controlled Y2O3 Nano-dots

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Abstract

The quasi-multilayered films consisting of YBa2Cu3Oy layers with BaSnO3 nano-rods and pseudo-layers of Y2O3 were prepared using a multilayering process in a PLD method, in order to investigate the influence of the spatial distribution of Y2O3 nano-dots on the hybrid flux pinning. The additional doping of Y2O3, however, hardly contributed to the flux pinning at higher temperature, probably due to Y2O3 nano-dots in small size in this work. At lower temperature, on the other hand, all the multilayered films show higher critical current density Jc than the film only with BaSnO3 nano-rods in a wide range of magnetic field orientations centered at B || ab. In particular, more flat angular dependence of Jc at low magnetic field around B || ab was found for the multilayered film with Y2O3 nano-dots more distributed in the out-of-plane direction. For B || c, by contrast, the magnetic field dependence of Jc was more weakened for the multilayered film with more correlated row of Y2O3 nano-dots along the in-plane direction.

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Sueyoshi, T., Tokita, Y., Fujiyoshi, T., Mitsugi, F., & Ikegami, T. (2015). Flux Pinning Properties in YBa2Cu3Oy Films with BaSnO3 Nano-rods and Spatially-controlled Y2O3 Nano-dots. In Physics Procedia (Vol. 65, pp. 137–140). Elsevier. https://doi.org/10.1016/j.phpro.2015.05.165

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