NDLI: Low temperature CEMS of Sn-implanted SiO2

Content Provider	Springer Nature Link
Author	Mantovan, R. Spiga, S. Fanciulli, M.
Copyright Year	2006
Abstract	Conversion electron Mössbauer spectroscopy (CEMS) at room and low temperature has been used to study thin SiO2 films implanted with Sn atoms and annealed at 900°C. This work focuses on the determination of the Debye temperature (θ D) and Debye–Waller factors (f) of the Sn oxidized phases formed in this system. The Sn2+ oxidation state is the predominant one, even if a small percentage of the Sn atoms is in the Sn4+ oxidation state. The real Sn-oxides fractions are calculated by normalizing the resonant areas to the f values, as calculated from the temperature dependence of the related resonant areas within a Debye model. The Sn4+ oxidation state, possibly related to Sn atoms close to the SiO2 surface, represents less than 20% of the Sn atoms. For the Sn2+ oxidation state, two different electronics configurations a and b, having different Debye temperature and hyperfine parameters are identified. The component a, with a lower θ D (137 K), is the predominant one and might be related to small (2–3 nm) amorphous SnO x clusters in the SiO2 matrix. The component b could be related to substitutional Sn atoms in the SiO2 network forming a local Sn environment similar to the SnO amorphous compound.
Starting Page	69
Ending Page	73
Page Count	5
File Format	PDF
ISSN	03043843
Journal	Hyperfine Interactions
Volume Number	165
Issue Number	1-4
e-ISSN	15729540
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2006-10-31
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	Sn nanocrystals low-temperature conversion electron Mössbauer spectroscopy Debye temperature Surfaces and Interfaces, Thin Films Condensed Matter Atoms, Molecules, Clusters and Plasmas Nuclear Physics, Heavy Ions, Hadrons
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Atomic and Molecular Physics, and Optics Physical and Theoretical Chemistry Condensed Matter Physics

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