Hyperfine Interactions

, Volume 221, Issue 1, pp 45–51

Stability of the Fe3 +  state in ZnO

  • D. Naidoo
  • H. P. Gunnlaugsson
  • T. E. Mølholt
  • R. Mantovan
  • H. Masenda
  • K. Bharuth-Ram
  • K. Johnston
  • H. P. Gislason
  • G. Langouche
  • S. Ólafsson
  • G. Weyer
  • R. Sielemann
  • the ISOLDE Collaboration
Article

DOI: 10.1007/s10751-012-0730-4

Cite this article as:
Naidoo, D., Gunnlaugsson, H.P., Mølholt, T.E. et al. Hyperfine Interact (2013) 221: 45. doi:10.1007/s10751-012-0730-4

Abstract

We have applied implantation of radioactive 57Mn +  (T1/2 = 1.5 min) at the ISOLDE facility at CERN with 50–60 keV energy to fluences <1012 /cm2 to study the emission Mössbauer spectra from the 14.4 keV transition of the 57Fe daughter atoms. For fluences ≥5 × 101157Mn/cm2, the spectra are dominated by the Fe3 +  state exhibiting a slow paramagnetic relaxation. We show that the Fe3 +  state in ZnO saturated by <101257Mn/cm2 implantations is unstable. The crystals can be reset by annealing at T > 760 K or storage at room temperature for 12 months, after which they show dominantly the Fe2 +  state for <2 × 101057Mn/cm2 implantations. These findings are discussed in terms of diffusion and/or annihilation of implantation-induced defects.

Keywords

Mössbauer Implantation-induced defects Annealing Diffusion 

Copyright information

© Springer Science+Business Media Dordrecht 2012

Authors and Affiliations

  • D. Naidoo
    • 1
  • H. P. Gunnlaugsson
    • 2
  • T. E. Mølholt
    • 3
  • R. Mantovan
    • 4
  • H. Masenda
    • 1
  • K. Bharuth-Ram
    • 5
  • K. Johnston
    • 6
  • H. P. Gislason
    • 3
  • G. Langouche
    • 7
  • S. Ólafsson
    • 3
  • G. Weyer
    • 2
  • R. Sielemann
    • 8
  • the ISOLDE Collaboration
  1. 1.School of PhysicsUniversity of the WitwatersrandJohannesburgSouth Africa
  2. 2.Department of Physics and AstronomyAarhus UniversityAarhus CDenmark
  3. 3.Science InstituteUniversity of IcelandReykjavikIceland
  4. 4.Laboratorio MDM IMM-CNRAgrate BrianzaItaly
  5. 5.School of PhysicsUniversity of KwaZulu-NatalDurbanSouth Africa
  6. 6.EP DivisionCERNGeneva 23Switzerland
  7. 7.Instituut voor Kern-en StralingsfysikaUniversity of LeuvenLeuvenBelgium
  8. 8.Helmholtz ForschungszentrumBerlinGermany

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