ACTA

Effect of TiO₂ Fibers on Properties of Single-Grain Bulk GdBCO Superconductors

P. Hajdova^a, I. Shepa^b, E. Mudra^b, M. Rajnak^{a, c}, J. Dusza^b, P. Diko^a
^aInstitute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Kosice, Slovakia
^bInstitute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 040 01 Kosice, Slovakia
^cFaculty of Electrical Engineering and Informatics, Technical University of Kosice, Letna 9, 042 00 Kosice, Slovakia

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The influence of TiO₂ microfibres doping on superconducting properties (critical temperature T_c and critical current density J_c) of single-grain bulk GdBa₂Cu₃O_7-δ (GdBCO) high-temperature superconductor was investigated. In this study, we prepared pure GdBCO and GdBCO+TiO₂ superconductor via the top-seeded melt growth method in air. The ceramic fibres were prepared using the electros pinning method and were added in the small quantity (0.05 wt%) for the increase of density of flux pinning centres. Magnetization measurements were performed on the specimens taken from several different locations of both studied samples. The experimental results showed that TiO₂ addition do affect the T_c along with the decrease of J_c.

DOI:10.12693/APhysPolA.137.800
topics: high-temperature single-grain GdBCO superconductor, TiO₂ fibres, superconducting properties