Abstract
Dy-doped Tl-1212 superconductors with varying Tl stoichiometry (TlxPb1 x)(Ba0.05Sr0.95)2(Ca0.8Dy0.2)Cu2Oz (x = 0.2, 0.4, 0.5, 0.6, 0.8, 1.0) were fabricated by a two step procedure. Tl-free precursors were prepared by a wet chemical malic acid gel method, followed by vapor phase thallination at temperatures between 880 and 920 °C. X-ray diffraction was employed to determine the phase-purity of the samples. The best critical temperatures were obtained for samples with x: 0.4, 0.5 and 0.6. Tc(0) values up to 100 K could be obtained for samples with the composition (Tl0.4Pb0.6)(Ba0.05Sr0.95)2(Ca0.8Dy0.2)Cu2Oz sintered at 915 °C. Lower Tl stoichiometry resulted in secondary phases, higher Tl stoichiometry led to a decrease in the superconducting properties.
| Original language | English |
|---|---|
| Pages (from-to) | 445-448 |
| Number of pages | 4 |
| Journal | Applied Physics A |
| Volume | 84 |
| DOIs | |
| Publication status | Published - 2006 |
Fields of science
- 104005 Electrochemistry
- 104006 Solid state chemistry
- 104014 Surface chemistry
- 104017 Physical chemistry
- 105113 Crystallography
- 105116 Mineralogy
- 503013 Subject didactics of natural sciences
- 204 Chemical Process Engineering
- 204001 Inorganic chemical technology
- 205016 Materials testing
- 210006 Nanotechnology
- 211104 Metallurgy