Abstract
We have studied the superconducting properties of air-processed melt-textured grown Sm-Ba-Cu-O samples with the addition of small amounts of Pd (0-1.0 wt%). The superconducting properties are enhanced with a small amount (0.1 wt%) of Pd addition, for which Tc is ∼89 K and Jc at 0 T and 77 K is 104 A cm-2. However, both Tc and Jc deteriorate as the Pd addition is further increased. In addition, Jc of Pd-doped samples exhibits anisotropic Jc(H, T) behaviour. Observation of the microstructures has shown that, as the Pd addition increases, the shape of the Sm2BaCuO5 particles (211-particles) tends to become rectangular, and the 211-particle size increases (larger than the control sample). We have observed changes in size and morphology of the 211-particles, dislocations and unidentified nanoscale defects in the Pd-doped samples, which imply that small amounts of Pd additions can affect the microstructure as well as altering the pinning mechanism.
Original language | English |
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Pages (from-to) | 71-77 |
Number of pages | 7 |
Journal | Superconductor Science and Technology |
Volume | 17 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2004 Jan 2 |
All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Condensed Matter Physics
- Metals and Alloys
- Electrical and Electronic Engineering
- Materials Chemistry