Enhanced flux pinning of single grain bulk (Gd, Dy)BCO superconductors processed by cold-top-seeded infiltration growth method

0525029 - FZÚ 2021 RIV CH eng J - Journal Article
Naik, S.P.K. - Muralidhar, M. - Jirsa, Miloš - Murakami, M.
Enhanced flux pinning of single grain bulk (Gd, Dy)BCO superconductors processed by cold-top-seeded infiltration growth method.
Materials Science and Engineering B-Advanced Functional Solid-State Materials. Roč. 253, Mar (2020), s. 1-10, č. článku 114494. ISSN 0921-5107. E-ISSN 1873-4944
Institutional support: RVO:68378271
Keywords : top-seeded IG process * microstructure * critical current density * flux pinning
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 4.051, year: 2020
Method of publishing: Open access
https://doi.org/10.1016/j.mseb.2020.114494

Single grain (Gd, Dy)BCO bulks were fabricated via cold-top-seeded infiltration growth process in air. Microstructural observations clarified that the size and dispersion of embedded (Gd, Dy)2BaCuO5 (211) secondary phase particles strongly varied in dependence of the grain refiners. The combined addition of Pt and CeO2 in each amount of 0.2 wt% increased the critical current density (Jcab, B‖c-axis) to 105 A/cm2 at 77 K and self-field.ThemicrostructuralandmagneticpropertiesofPtandCeO2 dopedsampleexhibitedhighhomogeneity throughoutthebulksample.TheoptimumamountofDy-211isaddedtoGdBCOalongwithPtandCeO2 resulted in highest superconducting Jcab of 72 kA/cm2 at an applied magnetic field of 2.2 T with improved flux pinning which is confirmed by high values of the reduced fields (hmax =H a/Hirr).
Permanent Link: http://hdl.handle.net/11104/0309253