Abstract
An infrared zone melter has been built to produce oriented thick films of the BSCCO 31 Å phase (Tc=80-90 K) on single-crystal MgO, using a feedstock composition of 2.4:1.5:1.0:1.8. Sample sizes were typically 6*25 mm and were superconducting after being traversed at or below 0.8 mu m s-1 in air. Substrate interactions, producing noticeable (Mg,Cu)O dendrites, occurred when traverse speeds were below 0.6 mu m s-1. At higher speeds, samples resembled partially melted BSCCO, and transition temperatures decreased with increasing traverse speeds. From this study, a traverse speed of 0.6 mu m s-1 was found to produce the greatest critical current density at 4.2 K of 2.2*104 A cm-2.
Original language | English (US) |
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Article number | 004 |
Pages (from-to) | 542-548 |
Number of pages | 7 |
Journal | Superconductor Science and Technology |
Volume | 5 |
Issue number | 9 |
DOIs | |
State | Published - 1992 |
All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Condensed Matter Physics
- Metals and Alloys
- Electrical and Electronic Engineering
- Materials Chemistry