Abstract
The X-ray electron photoemission spectra of a Tl0.7Bi0.3Sr1.6Ba0.superconductor were measured with Al K(alpha) and Mg K(alpha) radiation at room temperature. The Bi 4f spectrum was compared to the same spectra of Bi1.75Pb0.35Sr1.9Ca2.05Cu3.05Oy and Tl0.6Pb0.4Sr1.6Ba0.4Ca2Cu3Oy superconductors. In Bi,Pb-based superconductor only one type of Bi3+ ions is present. The Bi 4f spectrum in the Tl,Bi-superconductor consists of two contributions due to the different valences. The component from Bi5+ lines is in higher binding energy than from Bi3+. The ratio of trivalent Bi3+ to pentavalent Bi5+ bismuth ions was calculated from decomposition of the spinorbit split spectrum of the Bi 4f photoelectrons. The conclusion is that Bi is present in trivalent and in pentavalent form and the ratio of Bi3+ to Bi5+ is 1.87 +- 0.02.
| Original language | English |
|---|---|
| Pages (from-to) | 393 - 395 |
| Number of pages | 3 |
| Journal | Acta Physica Polonica A |
| Volume | 118 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2010 |
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