Possible cage motion of interstitial Fe in α-Al2O3
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Possible cage motion of interstitial Fe in α-Al2O3. / Gunnlaugsson, H. P.; Johnston, K.; Masenda, H.; Mantovan, R.; Mølholt, T. E.; Bharuth-Ram, K.; Gislason, H. P.; Langouche, G.; Madsen, M. B.; Naidoo, D.; Ólafsson, S.; Weyer, G.
In: Hyperfine Interactions, Vol. 219, 01.01.2013, p. 33-40.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Possible cage motion of interstitial Fe in α-Al2O3
AU - Gunnlaugsson, H. P.
AU - Johnston, K.
AU - Masenda, H.
AU - Mantovan, R.
AU - Mølholt, T. E.
AU - Bharuth-Ram, K.
AU - Gislason, H. P.
AU - Langouche, G.
AU - Madsen, M. B.
AU - Naidoo, D.
AU - Ólafsson, S.
AU - Weyer, G.
PY - 2013/1/1
Y1 - 2013/1/1
N2 - In addition to spectral components due to Fe2 + and Fe3 +, a single line is observed in emission Mössbauer spectra following low fluence (<1015 cm- 2) implantation of 57Fe*, 57Mn and 57Co in α-Al2O3. For the 57Co and 57Mn implantations, the intensity of the single line is found to depend on the emission angle relative to the crystal symmetry axis. This angular dependence can be explained by a non-isotropic f-factor and/or motion of the Fe ion between sites in an interstitial cage. It is argued that interstitial cage motion is a more likely explanation, as this can account for the lack of quadrupole splitting of the line.
AB - In addition to spectral components due to Fe2 + and Fe3 +, a single line is observed in emission Mössbauer spectra following low fluence (<1015 cm- 2) implantation of 57Fe*, 57Mn and 57Co in α-Al2O3. For the 57Co and 57Mn implantations, the intensity of the single line is found to depend on the emission angle relative to the crystal symmetry axis. This angular dependence can be explained by a non-isotropic f-factor and/or motion of the Fe ion between sites in an interstitial cage. It is argued that interstitial cage motion is a more likely explanation, as this can account for the lack of quadrupole splitting of the line.
KW - α-AlO
KW - Mn
KW - Emission Mössbauer spectroscopy
KW - Ion-implantation
U2 - 10.1007/s10751-012-0697-1
DO - 10.1007/s10751-012-0697-1
M3 - Journal article
AN - SCOPUS:84876192686
VL - 219
SP - 33
EP - 40
JO - Hyperfine Interactions
JF - Hyperfine Interactions
SN - 0304-3843
ER -
ID: 120849194