Bismuth Valence in a Tl_{0.7}Bi_{0.3}Sr_{1.6}Ba_{0.4}CaCu_{2}O_{y} Superconductor from X-Ray Photoemission Spectroscopy

• Authors: R. Zalecki , W. Woch , M. Kowalik , A. Kołodziejczyk , G. Gritzner
• Languages of publication: EN

Abstracts

EN

The X-ray electron photoemission spectra of a Tl_{0.7}Bi_{0.3}Sr_{1.6}Ba_{0.4}CaCu_2O_{y} superconductor were measured with Al K_{α} and Mg K_{α} radiation at room temperature. The Bi 4f spectrum was compared to the same spectra of Bi_{1.75}Pb_{0.35}Sr_{1.9}Ca_{2.05}Cu_{3.05}O_{y} and Tl_{0.6}Pb_{0.4}Sr_{1.6}Ba_{0.4}Ca_2Cu_3O_{y} superconductors. In Bi,Pb-based superconductor only one type of Bi^{3+} ions is present. The Bi 4f spectrum in the Tl,Bi-superconductor consists of two contributions due to the different valences. The component from Bi^{5+} lines is in higher binding energy than from Bi^{3+}. The ratio of trivalent Bi^{3+} to pentavalent Bi^{5+} bismuth ions was calculated from decomposition of the spin-orbit split spectrum of the Bi 4f photoelectrons. The conclusion is that Bi is present in trivalent and in pentavalent form and the ratio of Bi^{3+} to Bi^{5+} is 1.87 ± 0.02.

Keywords

EN

74.72.-h; 74.25.Jb; 79.60.-i

Discipline

• 74.72.-h: Cuprate superconductors
• 79.60.-i: Photoemission and photoelectron spectra(for photoelectron spectroscopy, see 87.64.ks in biological physics; 82.80.Pv in chemical analysis)
• 74.25.Jb: Electronic structure (photoemission, etc.)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2010
• Volume: 118
• Issue: 2
• Pages: 393-395

Dates

published

2010-08

Contributors

author

R. Zalecki

• Department of Solid State Physics, AGH University of Science and Technology, 30-059 Cracow, Poland

author

W. Woch

• Department of Solid State Physics, AGH University of Science and Technology, 30-059 Cracow, Poland

author

M. Kowalik

• Department of Solid State Physics, AGH University of Science and Technology, 30-059 Cracow, Poland
• Department of Physics, Rzeszów University of Technology, 35-959 Rzeszów, Poland

author

A. Kołodziejczyk

• Department of Solid State Physics, AGH University of Science and Technology, 30-059 Cracow, Poland

author

G. Gritzner

• Institute for Chemical Technology of Inorganic Materials, Johannes Kepler University Linz, A-4040 Linz, Austria

References

• 1. For early review see A. Bianconi, in: Proc. Taniguchi Int. Symp. Core Level Spectroscopy in Condensed System, Eds. A. Kotani, J. Kanamori, Springer Verlag, Berlin 1989, p. 99
• 2. For review see A. Bansil, J. Phys. Chem. Solids 52, 1493 (1991) and in: K. Ueda, T. Moriya, Y. Takahashi, J. Phys. Chem. Solids 53, 1515 (1992)
• 3. M. Mair, W. König, G. Gritzner, Supercond. Sci. Technol. 8, 894 (1995)
• 4. W. König, G. Gritzner, P. Diko, J. Kovác, M. Timko, J. Mater. Chem. 5, 879 (1995)
• 5. W. König, M. Mair, G. Gritzner, J. Supercond. 11, 107 (1998)
• 6. R. Zalecki, A. Kołodziejczyk, W. Koenig, G. Gritzner, Acta Phys. Pol. A 98, 513 (2000)
• 7. R.W.M. Kwok, XPS Peak Fitting Program Version 4.1, Department of Chemistry, The Chinese University of Hong Kong, http://www.phy.cuhk.edu.hk/~surface/XPSPEAK

Identifiers

DOI

10.12693/APhysPolA.118.393