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Thermally Detected Electron Spin Resonance of Fe2+ in LiNbO3

  • S. Juppe
  • O. F. Schirmer
Conference paper

Abstract

Fe2+ is an important sensitizer of the photorefractive effect of LiNbO3. Thermally detected electron spin resonance at 35 GHz was used to detect this non-Kramers ion and to analyze the properties of its lowest states. ESR is found to be caused by electrically induced ΔmS = ±2 transitions between |mS = ±1> levels lying ∿15 cm-1 above the|ms = 0> groundstate. This splitting is caused by second order spin orbit coupling within the singlet orbital groundstate. The next orbital levels, a doublet, split-off by the trigonal crystal field, lies at ≥ 600 cm-1 above the groundstate. Strong low symmetry perturbations lead to very wide and asymmetric lines.

PACS number

7630F 

References

  1. 1).
    W.S. Moore, T.M. Al-Sharbati, J. Phys. D6, 367 (1973)ADSCrossRefGoogle Scholar
  2. 2).
    A. Abragam, B. Bleaney: EPR of Transition Ions, p. 209ff, Clarendon 1970Google Scholar
  3. 3).
    V.F. Meshcheriakov et al., Sov. Phys. JETP 39, 920 (1974)ADSGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1990

Authors and Affiliations

  • S. Juppe
    • 1
  • O. F. Schirmer
    • 1
  1. 1.Universität Osnabrück, Fachbereich PhysikOsnabrückGermany

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