Fe-contacts on InAs(100) and InP(100) characterised by conversion electron Mössbauer spectroscopy

We have grown 4 nm thin films of 57Fe on InAs(100) and InP(100) surfaces by use of MBE and studied the samples by 57Fe conversion electron Mössbauer spectroscopy. In the case of InAs, the Mössbauer spectrum showed a sextet due to α-Fe and a further magnetically split component with slightly smaller...

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Bibliographic Details
Published in:Solid state communications 2005-03, Vol.133 (9), p.579-581
Main Authors: Damsgaard, C.D., Gunnlaugsson, H.P., Weyer, G., Bindslev Hansen, J., Jacobsen, C.S., Skov, J.L., Rasmussen, I., Mørup, S.
Format: Article
Language:English
Subjects:
A. Thin films
C. Mössbauer spectroscopy
Condensed matter: electronic structure, electrical, magnetic, and optical properties
D. Phase transitions
Exact sciences and technology
Magnetic resonances and relaxations in condensed matter, mössbauer effect
Mössbauer effect
other γ-ray spectroscopy
Physics
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Summary:We have grown 4 nm thin films of 57Fe on InAs(100) and InP(100) surfaces by use of MBE and studied the samples by 57Fe conversion electron Mössbauer spectroscopy. In the case of InAs, the Mössbauer spectrum showed a sextet due to α-Fe and a further magnetically split component with slightly smaller hyperfine field, which is attributed to interface components. This result indicates that there is a relatively sharp interface between Fe and InAs. On the contrary, the spectrum of the InP sample showed a sextet with very broad lines and a smaller average hyperfine field. This suggests a strong chemical reaction between iron and the substrate, which results in the formation of a poorly crystalline phase.
ISSN:0038-1098
1879-2766
DOI:10.1016/j.ssc.2004.12.030