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Single-Grain Bulk YBa2Cu3Oy Superconductors Grown by Infiltration Growth Process Utilizing the YbBa2Cu3Oy + Liquid Phase as a Liquid Source

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Abstract

The top-seeded infiltration growth (IG) processed YBa2Cu3Oy (Y-123) has several advantages compared to the same material produced by other melt process techniques. There is usually no shrinkage, a limited number of pores, and an uniform secondary phase particle dispersion in the Y-123 matrix. These characteristics of the IG process are very attractive for several industrial applications. In this paper, we produced a large single-grain Y-123 by IG and top seeded melt-growth process. Utilizing commercial YbBa2Cu3Oy (Yb-123) and a homemade Y2BaCuO5 (Y-211), we produced bulk YBa2Cu3Oy samples using Yb-123 + liquid (1:1) as a liquid source. Four facet lines on the top surfaces of the as-grown samples indicated a uniform growth from the seed up to sample edges. Magnetization measurements by SQUID magnetometer showed a sharp superconducting transition with Tc,onset at 92.1 K. The critical current density at 77 K and self-field was 39,000 A/cm2. Trapped field results confirmed that single grain Y-123 samples were produced utilizing the above process. Our results prove that Yb-123 + liquid (1:1) as a liquid source is effective in producing single grain Y-123 material by IG process.

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Acknowledgments

Sushma would like to thank the “International High School Internship Program Committee of Shibaura Institute of Technology (SIT)” for selecting her research application at the 2017 Summer Internship Program and providing her an opportunity to work at SIT laboratories. This work was presented in the 10th International Workshop on Processing and Applications of Superconducting (RE)BCO Large Grain Materials (PASREG 2017) and 30th International Symposium on Superconductivity (ISS 2017) as oral presentations and received high recognition within internationally renowned Board Committee as it was awarded with Best Presenter Award and Distinguished Speaker Award.

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Authors and Affiliations

  1. Superconducting Material Laboratory, Department of Material Science and Engineering, Shibaura Institute of Technology, 3-7-5 Toyosu, Koto-ku, Tokyo, 135-8546, Japan

    Miryala Sushma & Masato Murakami

  2. Seisen International School, Chome-12-15 Yoga, Setagaya, Tokyo, 158-0097, Japan

    Miryala Sushma

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  1. Miryala Sushma
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  2. Masato Murakami
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Correspondence to Miryala Sushma.

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Sushma, M., Murakami, M. Single-Grain Bulk YBa2Cu3Oy Superconductors Grown by Infiltration Growth Process Utilizing the YbBa2Cu3Oy + Liquid Phase as a Liquid Source. J Supercond Nov Magn 31, 2291–2295 (2018). https://doi.org/10.1007/s10948-018-4758-9

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  • DOI: https://doi.org/10.1007/s10948-018-4758-9

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