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2010 | 118 | 2 | 393-395
Article title

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

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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.
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EN
Contributors
author
  • Department of Solid State Physics, AGH University of Science and Technology, 30-059 Cracow, Poland
author
  • Department of Solid State Physics, AGH University of Science and Technology, 30-059 Cracow, Poland
author
  • 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
  • Department of Solid State Physics, AGH University of Science and Technology, 30-059 Cracow, Poland
author
  • 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
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv118n243kz
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