Trapped Field of YBCO Bulk Superconductors Prepared by Infiltration Growth Process
L. Vojtkova, P. Diko and S. Piovarči
Institute of Experimental Physics, SAS, Watsonova 47, 040 01 Košice, Slovakia
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Single grain Y1Ba2Cu3O7-x (YBCO) bulk superconductors were prepared from different starting precursors. In the first case, Y2Ba1Cu1O5 (Y211) powder as the solid phase and the liquid phase of mixture of YBa2Cu3O7-x+BaCuO2+CuO powders were used. In the second case, the solid phase was prepared from the mixture of Y2O3+BaCuO2 instead of the conventionally used Y211, and as the liquid phase a mixture of Y2O3+BaCuO2+CuO powders was used. The trapped field measurements at 77 K were performed and microstructure of samples was studied by polarized light microscopy. The positive influence of Y2O3+BaCuO2 starting precursor on the oxygenation, Y211 particle refinement and measured trapped field is shown.

DOI: 10.12693/APhysPolA.131.1048
PACS numbers: 74.72.-h, 74.81.Bd, 61.50.-f, 74.25.Ha, 81.10.Fq