Hyperfine Interactions

, Volume 72, Issue 1–3, pp 173–189 | Cite as

Mössbauer studies of EFG of the different57Fe(57Co)-Oxygen configurations in oriented Y−Ba−Cu−O

  • Vladimir Chechersky
  • Amar Nath
High Temperature Superconductivity

Abstract

We have determined the various parameters of the electric field gradient (EFG) for different Fe-oxygen configurations. This was achieved by analyses of a variety of spectra using a procedure which allows fitting of all spectra of oriented 1-2-3 compounds obtained at different tilt angles β simultaneously, taking into account the degree of texture. The use of a point charge model is invalidated because of the high degree of estimated covalence. The Mössbauer parameters are rationalized. The absence of any observed anisotropy of the mean square displacement of the dopant at the Cu(1) site is rather intriguing.

Keywords

Oxygen Thin Film Anisotropy Tilt Angle Field Gradient 
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.
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Copyright information

© J.C. Baltzer AG. Scientific Publishing Company 1992

Authors and Affiliations

  • Vladimir Chechersky
    • 1
  • Amar Nath
    • 1
  1. 1.Department of ChemistryDrexel UniversityPhiladelphiaUSA

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