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Submicron size GdBaCuO particles as source for large critical current densities in (NdEuGd)BaCuO

EPJ Applied Physics, ISSN: 1286-0042, Vol: 7, Issue: 2, Page: 99-102
1999
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Article Description

The effect of (NdEuGd)BaCuO (NEG-211), and GdBaCuO (Gd-211) additions on melt-processed (NdEuGd)BaCuO (NEG-123) composites are investigated using a combination of transmission electron microscopy (TEM) and measurements of critical current densities, J. TEM observations demonstrate that we could successfully embed submicron-size 211 particles within the NEG-123 matrix. EDX analysis revealed that these submicron-size particles consist mainly of Gd in the rare earth site. The presence of such 211 particles leads to a dramatic increase of J in low fields as well as in the high field region. For NEG-123 with an addition of 40 mol% of NEG-211 a critical current density of 70 000 A/cm at 77 K, 2.2 T is observed for the field applied parallel to the c axis.

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