Abstract
Superconducting (Hg,Pb)Ba2CaCu2Oy thin films have been prepared in a two step process. Approximatively 0.2 *m thick Ba-Ca-Cu-O or Pb-Ba-Ca-Cu-O precursor films have been deposited on MgO (100) monocrystalline substrates by a sequential evaporation method. Hg was then introduced into the precursor in a closed silica tube.
The surface morphology was characterized by SEM, the composition of the superconducting phase was determined by wave dispersive X-ray electron microanalysis. Phase identification was carried out by X-ray diffraction. The c-axis oriented plate-like crystals of the Hg-1212 and (Hg,Pb)-1212 phase were weakly connected. Although coverage of the substrate was uneven, we were able to measure transport superconductivity. The partial substitution of Hg by Pb did not significantly influence the Tc values. For both the Pb-free and Pb-doped Hg-1212 samples Tc(on)-values of about 132 K and the zero resistance temperatures Tc(0) from 105 to 117 K were determined.
| Original language | English |
|---|---|
| Pages (from-to) | 74 - 78 |
| Number of pages | 5 |
| Journal | Physica C: Superconductivity |
| Issue number | 307 |
| Publication status | Published - Jan 1998 |
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