Abstract
We have studied the effect of precursor preparation methods on the superconducting properties of (Nd, Sm, Eu)-Ba-Cu-O melt-textured in 1% O2-Ar. X-ray diffraction analyses confirmed that melt-quenching was effective in suppressing the formation of RE rich RE1+xBa2-xCu3Oy precursor powders compared to a sintering method, and thus resulted in a sharp superconducting transition with an onset Tc exceeding 94.5 K. A clear secondary peak effect was observed in the magnetization curves, which shows that the field induced pinning is active like the other RE-Ba-Cu-O (RE; Nd, Sm, Eu, Gd). One can conclude that poor superconducting properties of (Nd, Sm, Eu)-Ba-Cu-O obtained in the previous reports are not intrinsic to the system but to an unoptimized precursor preparation method.
Original language | English |
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Pages (from-to) | 39-42 |
Number of pages | 4 |
Journal | Physica C: Superconductivity and its applications |
Volume | 309 |
Issue number | 1-2 |
DOIs | |
Publication status | Published - 1998 Dec 1 |
Externally published | Yes |
Keywords
- (Nd, Sm, Eu)-Ba-Cu-O
- Critical current density
- Critical temperature
- Melt process
- Melt quenching
- Peak effect
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering