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Hyperfine Interactions

, 237:40 | Cite as

Emission Mössbauer spectroscopy study of fluence dependence of paramagnetic relaxation in Mn/Fe implanted ZnO

  • H. MasendaEmail author
  • S. Geburt
  • K. Bharuth-Ram
  • D. Naidoo
  • H. P. Gunnlaugsson
  • K. Johnston
  • R. Mantovan
  • T. E. Mølholt
  • M. Ncube
  • S. Shayestehaminzadeh
  • H. P. Gislason
  • G. Langouche
  • S. Ólafsson
  • C. Ronning
  • ISOLDE Collaboration
Article
Part of the following topical collections:
  1. Proceedings of the International Conference on the Applications of the Mössbauer Effect (ICAME 2015), Hamburg, Germany, 13-18 September 2015

Abstract

Emission Mössbauer Spectroscopy following the implantation of radioactive precursor isotope 57Mn+ (T 1/2= 1.5 min) into ZnO single crystals at ISOLDE/CERN shows that a large fraction of 57Fe atoms produced in the 57Mn beta decay is created as paramagnetic Fe3+ with relatively long spin-lattice relaxation times. Here we report on ZnO pre-implanted with 56Fe to fluences of 2×1013, 5×10 13 and 8 × 1013 ions/cm2 in order to investigate the dependence of the paramagnetic relaxation rate of Fe3+ on fluence. The spectra are dominated by magnetic features displaying paramagnetic relaxation effects. The extracted spin-lattice relaxation rates show a slight increase with increasing ion fluence at corresponding temperatures and the area fraction of Fe3+ at room temperature reaches a maximum contribution of 80(3)% in the studied fluence range.

Keywords

ZnO Fe implantation Emission Mössbauer spectroscopy Spin relaxation Paramagnetism 

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Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  • H. Masenda
    • 1
    Email author
  • S. Geburt
    • 2
  • K. Bharuth-Ram
    • 3
    • 4
  • D. Naidoo
    • 1
  • H. P. Gunnlaugsson
    • 5
    • 6
  • K. Johnston
    • 5
  • R. Mantovan
    • 7
  • T. E. Mølholt
    • 5
  • M. Ncube
    • 1
  • S. Shayestehaminzadeh
    • 8
  • H. P. Gislason
    • 9
  • G. Langouche
    • 6
  • S. Ólafsson
    • 9
  • C. Ronning
    • 2
  • ISOLDE Collaboration
  1. 1.School of PhysicsUniversity of the WitwatersrandJohannesburgSouth Africa
  2. 2.Institute of Solid State PhysicsUniversity of JenaJenaGermany
  3. 3.Physics DepartmentDurban University of TechnologyDurbanSouth Africa
  4. 4.School of Chemistry and PhysicsUniversity of KwaZulu-NatalDurbanSouth Africa
  5. 5.PH Dept, ISOLDE/CERNGenevaSwitzerland
  6. 6.KU LeuvenInstituut voor Kern-en StralingsfysicaLeuvenBelgium
  7. 7.Laboratorio MDM, IMM-CNRAgrate BrianzaItaly
  8. 8.Institute of Materials ChemistryRWTH Aachen UniversityAachenGermany
  9. 9.Science InstituteUniversity of IcelandReykjavíkIceland

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