NDLI: A temperature-dependent Mössbauer study of 57Fe in the vanadium pentoxide/vanadium bronze oxide systems

Content Provider	Springer Nature Link
Author	Naicker, V.V. Bharuth Ram, K.
Copyright Year	1999
Abstract	Our previous study involving V2O5 doped with various concentrations of Fe has shown that there are two sites present in the V2O5 lattice, and two sites present in the vanadium oxide bronze lattice. This study further investigates the behaviour of the hyperfine parameters of the 57Fe ions at these sites as a function of temperature. Temperature-dependent Mössbauer spectra ranging from room temperature to 573 K were obtained on samples of V2O5 containing 5%, 15% and 80% Fe. The isomer shifts of the various components display the usual second order Doppler shift as a function of temperature, and no significant changes were observed in the magnitude of the quadrupole splittings. From the Duncan–Golding correlation diagram, the valence states of the Fe ions are found to be 3+. No component was observed with increasing temperature which could be correlated with the population of Fe2+ states. It therefore seems probable that the semiconducting properties of vanadium pentoxide containing Fe are associated with electron hopping between the V4+ and V5+ valence sites rather than in the Fe3+ and Fe2+ valence sites.
Starting Page	551
Ending Page	555
Page Count	5
File Format	PDF
ISSN	03043843
Journal	Hyperfine Interactions
Volume Number	120
Issue Number	1-8
e-ISSN	15729540
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	1999-01-01
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	Surfaces and Interfaces, Thin Films Nuclear Physics, Heavy Ions, Hadrons Atoms, Molecules, Clusters and Plasmas Condensed Matter
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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