Determination of Defect Symmetries from ENDOR Angular Dependences

  • Johann-Martin Spaeth
  • Jürgen R. Niklas
  • Ralph H. Bartram
Chapter
Part of the Springer Series in Solid-State Sciences book series (SSSOL, volume 43)

Abstract

The analysis of ENDOR angular dependences may sometimes be difficult since there is no systematic procedure leading from the experimental data directly to the structure of the defect. The only way to proceed is by guessing a defect model, and comparing angular dependences calculated for this model with the experimental ones. If no agreement is achievable, the defect model is wrong and must be modified. The interaction parameters, such as the shf and the quadrupole constants, are not known for the defect. They must be ”fitted” in order to obtain coincidence between the simulated and the experimental angular dependences. This fit, however, will only work if the structure of the model is correct in all details. Only the angular dependence of the ENDOR spectra provides the essential information about the defect structure. Therefore, a single ENDOR spectrum tells nothing about the validity of a defect model in most cases. The main step in any analysis of an ENDOR angular dependence is the simulation of angular dependences for a given defect model and given interaction parameters. The second step then is the fit of the interaction parameters to the experimental angular dependence.

Keywords

Angular Dependence Defect Model Magnetic Field Variation Interaction Tensor ENDOR Spectrum 
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

© Springer-Verlag Berlin Heidelberg 1992

Authors and Affiliations

  • Johann-Martin Spaeth
    • 1
  • Jürgen R. Niklas
    • 1
  • Ralph H. Bartram
    • 2
  1. 1.Fachbereich PhysikUniversität-GesamthochschulePaderbornFed. Rep. of Germany
  2. 2.Department of PhysicsUniversity of ConnecticutStorrsUSA

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