Possible cage motion of interstitial Fe in α-Al2O3

H. P. Gunnlaugsson; K. Johnston; H. Masenda; R. Mantovan; T. E. Mølholt; K. Bharuth-Ram; H. P. Gislason; G. Langouche; M. B. Madsen; D. Naidoo; S. Ólafsson; G. Weyer

doi:10.1007/s10751-012-0697-1

Possible cage motion of interstitial Fe in α-Al₂O₃

H. P. Gunnlaugsson, K. Johnston, H. Masenda, R. Mantovan, T. E. Mølholt, K. Bharuth-Ram, H. P. Gislason, G. Langouche, M. B. Madsen, D. Naidoo, S. Ólafsson, G. Weyer

Astrophysics and Planetary Science

2 Citations (Scopus)

Abstract

In addition to spectral components due to Fe^{2 +} and Fe^{3 +}, 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.

Original language	English
Journal	Hyperfine Interactions
Volume	219
Pages (from-to)	33-40
Number of pages	8
ISSN	0304-3843
DOIs	https://doi.org/10.1007/s10751-012-0697-1
Publication status	Published - Apr 2013

Keywords

α-AlO
Mn
Emission Mössbauer spectroscopy
Ion-implantation

Access to Document

10.1007/s10751-012-0697-1

http://www.scopus.com/inward/record.url?scp=84876192686&partnerID=8YFLogxK

Cite this

@article{de8f04f9419143fd87e4a9aa8b3922fd,

title = "Possible cage motion of interstitial Fe in α-Al2O3",

abstract = "In addition to spectral components due to Fe2 + and Fe3 +, a single line is observed in emission M{\"o}ssbauer 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.",

keywords = "α-AlO, Mn, Emission M{\"o}ssbauer spectroscopy, Ion-implantation",

author = "Gunnlaugsson, {H. P.} and K. Johnston and H. Masenda and R. Mantovan and M{\o}lholt, {T. E.} and K. Bharuth-Ram and Gislason, {H. P.} and G. Langouche and Madsen, {M. B.} and D. Naidoo and S. {\'O}lafsson and G. Weyer",

year = "2013",

month = apr,

doi = "10.1007/s10751-012-0697-1",

language = "English",

volume = "219",

pages = "33--40",

journal = "Hyperfine Interactions",

issn = "0304-3843",

publisher = "Springer",

}

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 - 2013/4

Y1 - 2013/4

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

SN - 0304-3843

VL - 219

SP - 33

EP - 40

JO - Hyperfine Interactions

JF - Hyperfine Interactions