Melt processing and high performance of binary (Nd, Sm)-Ba-Cu-O superconductors
Binary (Nd, Sm)-Ba-Cu-O superconductors with T sub(c) of 96 K and a high irreversibility field up to 8 T have been fabricated in air via a newly developed technique. The initial composition was controlled by using binary (Nd, Sm) sub(2)BaO sub(4) as an addition. In comparison with both NdBaCuO and Y...
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| Veröffentlicht in: | Superconductor science & technology 1999-05, Vol.12 (5), p.301-307 |
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| container_title | Superconductor science & technology |
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| creator | Hu, A Schätzle, P Bieger, W Verges, P Fuchs, G Krabbes, G |
| description | Binary (Nd, Sm)-Ba-Cu-O superconductors with T sub(c) of 96 K and a high irreversibility field up to 8 T have been fabricated in air via a newly developed technique. The initial composition was controlled by using binary (Nd, Sm) sub(2)BaO sub(4) as an addition. In comparison with both NdBaCuO and YBaCuO melt-textured superconductors, the present composition showed a remarkable enhancement of critical current densities in an intermediate field regime (1-3 T). Microstructural observations and compositional analysis showed that the distributions of Nd and Sm in the (Nd, Sm)-123 matrix were homogeneous while the atomic ratio between these two rare earth elements was inconsistent with that in the nominal composition. These new characteristics were thought to cohere with the different solubilities between Nd and Sm in the liquid phase. Finally, trapped magnetic field mapping showed a single-domain shape of the trapped field, which indicated the growth of a single grain in the samples. |
| doi_str_mv | 10.1088/0953-2048/12/5/310 |
| format | Article |
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| language | eng |
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| source | Institute of Physics Journals |
| subjects | Condensed matter: electronic structure, electrical, magnetic, and optical properties Critical currents Cuprates superconductors (high tc and insulating parent compounds) Exact sciences and technology High-Tc compounds Other cuprates Physics Properties of type I and type II superconductors Superconductivity |
| title | Melt processing and high performance of binary (Nd, Sm)-Ba-Cu-O superconductors |
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