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dc.contributor.authorMølholt, Torben Esmann-
dc.contributor.authorMantovan, R.-
dc.contributor.authorGunnlaugsson, H.P.-
dc.contributor.authorSvane, A.-
dc.contributor.authorMasenda, Hilary-
dc.contributor.authorNaidoo, D.-
dc.contributor.authorBharuth-Ram, Krish-
dc.contributor.authorFanciulli, M.-
dc.contributor.authorGíslason, H.P.-
dc.contributor.authorJohnston, K.-
dc.contributor.authorLangouche, G.-
dc.contributor.authorÓlafsson, S.-
dc.contributor.authorSielemann, R.-
dc.contributor.authorWeyer, G.-
dc.identifier.citationMølholt, T.E. et al. 2014. Interstitial Fe in MgO. Journal of Applied Physics. 115(2):
dc.identifier.issn0021-8979 (print)-
dc.identifier.issn1089-7550 (online)-
dc.description.abstractIsolated Fe-57 atoms were studied in MgO single-crystals by emission Mossbauer spectroscopy following implantation of Mn-57 decaying to Fe-57. Four Mossbauer spectral components were found corresponding to different Fe lattice positions and/or charge states. Two components represent Fe atoms substituting Mg as Fe2+ and Fe3+, respectively; a third component is due to Fe in a strongly implantation-induced disturbed region. The fourth component, which is the focus of this paper, can be assigned to Fe at an interstitial site. Comparison of its measured isomer shift with ab initio calculations suggests that the interstitial Fe is located on, or close to, the face of the rock-salt MgO structure. To harmonize such an assignment with the measured near-zero quadrupole interaction a local motion process (cage motion) of the Fe has to be stipulated. The relation of such a local motion as a starting point for long range diffusion is discussed.en_US
dc.format.extent2 pen_US
dc.publisherAIP Publishingen_US
dc.titleInterstitial Fe in MgOen_US
dc.description.availabilityCopyright: 2014. AIP Publishing. Due to copyright restrictions, only the abstract is available. For access to the full text item, please consult the publisher's website. The definitive version of the work is published in Journal of Applied Physics, Vol 115. Issue 2.
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Appears in Collections:Research Publications (Applied Sciences)
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