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Optimization of the Dy Content in Single Crystalline GdBCO Bulk Superconductors Fabricated in Air Via Top-Seeded Infiltration Growth Process

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Abstract

Single-crystalline bulk GdBa2Cu3O7−δ (GdBCO) superconductors were fabricated with top-seeded infiltration-growth technique (TSIG) in air by adding the different amounts of Dy2BaCuO5 (Dy-211) particles (5, 10, 15, 20, 25, 30, 35, and 40 wt%). All the samples show superconducting critical temperature at ∼93 K with sharp transition irrespective of the chemical composition. X-ray diffraction measurements confirmed that all the samples were single domain with high alignment. Microstructural studies through scanning electron microscopy showed that TSIG-processed GdBCO samples contained 211 phase particles of two different sizes, i.e., ∼2–4 and ∼10 μ m. The addition of Dy-211 phase particles led to a significant enhancement of critical current density (J c) at 77 K. GdBCO superconductor with the addition of 20 wt% of Dy-211 showed the highest J c of 45.5 kA/cm 2 at 77 K and self field.

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Acknowledgments

SPKN would like to acknowledge Shibaura Institute of Technology, Tokyo, Japan, gratefully for providing fellowship.

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  1. Superconducting Materials Laboratory, Graduate School of Science and Engineering, Shibaura Institute of Technology, Tokyo, 135-8548, Japan

    S. Pavan Kumar Naik, M. Muralidhar & M. Murakami

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  1. S. Pavan Kumar Naik
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Correspondence to M. Muralidhar.

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Pavan Kumar Naik, S., Muralidhar, M. & Murakami, M. Optimization of the Dy Content in Single Crystalline GdBCO Bulk Superconductors Fabricated in Air Via Top-Seeded Infiltration Growth Process. J Supercond Nov Magn 31, 981–987 (2018). https://doi.org/10.1007/s10948-017-4277-0

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