Mössbauer study of the temperature dependence of electron delocalization in mixed valence freudenbergite

The evolution of the electron delocalization in the ferrous subspectra in a sample of mixed valence ferrous‐ferric freudenbergite has been followed by Mössbauer spectroscopy from 6 K to 650 K. The spectral changes do not involve the ferric component, leading to the conclusion that it is due to a the...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2020-09, Vol.103 (10), p.5496-5501
Main Authors: Cashion, John D., Vance, Eric R., Ryan, Dominic H.
Format: Article
Language:English
Subjects:
electron delocalization
Electrons
Ferrous ions
freudenbergite
iron titanate
mixed valence
Mossbauer spectroscopy
Mössbauer effect
Temperature dependence
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Summary:The evolution of the electron delocalization in the ferrous subspectra in a sample of mixed valence ferrous‐ferric freudenbergite has been followed by Mössbauer spectroscopy from 6 K to 650 K. The spectral changes do not involve the ferric component, leading to the conclusion that it is due to a thermally driven delocalization of the sixth d‐electron on the ferrous ions. The phenomenon does not occur in samples of pure ferrous freudenbergite.
ISSN:0002-7820
1551-2916
DOI:10.1111/jace.17190