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Hyperfine Interactions

, Volume 197, Issue 1–3, pp 89–94 | Cite as

Observation of spin-lattice relaxations of dilute Fe3+ in MgO by Mössbauer spectroscopy

  • T. E. Mølholt
  • R. Mantovan
  • H. P. Gunnlaugsson
  • D. Naidoo
  • S. Ólafsson
  • K. Bharuth-Ram
  • M. Fanciulli
  • K. Johnston
  • Y. Kobayashi
  • G. Langouche
  • H. Masenda
  • R. Sielemann
  • G. Weyer
  • H. P. Gíslason
Article

Abstract

We present a method to describe the temperature dependence of emission Mössbauer spectra showing slow spin-lattice relaxations of Fe3 +  in MgO single crystals, obtained after implantation of 57Mn at ISOLDE/CERN. The analysis is based on the Blume-Tjon model for the line-shape of relaxing paramagnetic sextets with the spin relaxation rate, τ  − 1 as a parameter. The temperature dependent spin relaxation rate of Fe3 +  in MgO is found to increase to ~108 s − 1 at 647 K by assuming a relaxation rate of τ  − 1 < 106 s − 1 at 77 K. The results are in accordance with those obtained by electron paramagnetic resonance spectroscopy demonstrating the possibility of retrieving spin-lattice relaxation rates of dilute Fe3 +  from emission Mössbauer spectroscopy of Mn/Fe-implanted oxides.

Keywords

Spin-lattice relaxations Dilute Fe3 +  MgO Emission Mössbauer spectroscopy 

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Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  • T. E. Mølholt
    • 1
  • R. Mantovan
    • 2
  • H. P. Gunnlaugsson
    • 3
  • D. Naidoo
    • 4
  • S. Ólafsson
    • 1
  • K. Bharuth-Ram
    • 5
  • M. Fanciulli
    • 2
    • 6
  • K. Johnston
    • 7
  • Y. Kobayashi
    • 8
  • G. Langouche
    • 9
  • H. Masenda
    • 4
  • R. Sielemann
    • 10
  • G. Weyer
    • 3
  • H. P. Gíslason
    • 1
  1. 1.Science InstituteUniversity of Iceland107 ReykjavíkIceland
  2. 2.Laboratorio MDM-IMM-CNRAgrate Brianza (MB)Italy
  3. 3.Department of Physics and AstronomyAarhus UniversityÅrhusDenmark
  4. 4.School of PhysicsUniversity of the WitwatersrandJohannesburgSouth Africa
  5. 5.School of PhysicsUniversity of KwaZulu-NatalDurbanSouth Africa
  6. 6.Dipartimento di Scienza dei MaterialiUniversità di Milano BicoccaMilanoItaly
  7. 7.PH DeptISOLDE/CERNGeneva 23Switzerland
  8. 8.The Institute of Physical and Chemical ResearchWakoJapan
  9. 9.Instituut voor Kern- en StralingsfysikaUniversity of LeuvenLeuvenBelgium
  10. 10.Helmholtz ZentrumBerlinGermany

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