Advertisement

Development of the method for low-temperature investigations of HTSC systems on an X-ray electron magnetic spectrometer

  • E. A. NaimushinaEmail author
  • I. N. Shabanova
  • V. I. Kukuyev
Proceedings of the XXXIV Conference on Low-Temperature Physics “NT-34”

Abstract

Peculiarities of the chemical structure of bulk polycrystalline samples of the high-temperature superconductors Bi2Sr2CaCu2O8, BiSrCaCu2O5.5, BiSrCaCu3O8, and YBa2Cu3O7 − δ have been investigated in detail at room and superconducting temperatures on an X-ray electron magnetic spectrometer equipped with an attachment for low-temperature studies. It is shown that covalent bonding is formed at a superconducting temperature between copper and oxygen due to Cu2+ ions. Due to the enhancement of the d(Cu)–p(O) hybridization of copper and oxygen electrons in the superconducting state, the d-electron density increases near E F. The occurrence of additional peaks in the O1s and Sr3d (Ba3d) spectra after transition of the system to the superconducting state indicates changes in the nearest environment of O and Sr (Ba) atoms, in particular, the transition of Sr atoms to a higher oxidation state.

Keywords

Superconducting State High Oxidation State HTSC Sample HTSC Compound HTSC System 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Hüfner, St., Photoelectron Spectroscopy, Berlin: Springer, 1995, p. 205.Google Scholar
  2. 2.
    Naimushina, Ye.A., Shabanova, I.N., and Chirkov, A.G., J. Electron Spectrosc. Relat. Phenom., 2004, vol. 137-140C, p. 535.CrossRefGoogle Scholar
  3. 3.
    Kormilets, V.I., Fiz. Met. Metalloved., 1997, vol. 83, no. 7, p. 5 [Phys. Met. Metallogr. (Engl. Transl.), vol. 83, no. 1, p. 1].Google Scholar
  4. 4.
    Thuller, M.R., Benbow, R.L., and Hurych, Z., Phys. Rev. B: Condens. Matter Mater. Phys., 1982, vol. 26, no. 9, p. 669.ADSGoogle Scholar
  5. 5.
    Sangaletti, L. and Parmigiani, F., Solid State Commun., 2000, vol. 113, p. 29.CrossRefGoogle Scholar

Copyright information

© Allerton Press, Inc. 2007

Authors and Affiliations

  • E. A. Naimushina
    • 1
    Email author
  • I. N. Shabanova
    • 2
  • V. I. Kukuyev
    • 3
  1. 1.Udmurt State UniversityIzhevskRussia
  2. 2.Physicotechnical InstituteUral Division of the Russian Academy of SciencesIzhevskRussia
  3. 3.Voronezh State UniversityVoronezhRussia

Personalised recommendations