X-ray absorption spectroscopic and Mössbauer studies of redox and cation-ordering processes in manganese ferrite

MnFe 2O 4 samples were prepared by the thermal decomposition of a freeze-dried MnFe 2-formate precursor. Depending on the decomposition conditions, such as temperature and oxygen partial pressure, ferrites with different oxidation state and cation distribution were formed. X-ray absorption spectra o...

Full description

Saved in:
Bibliographic Details
Published inSolid state ionics Vol. 101; pp. 351 - 357
Main Authors Bonsdorf, G., Denecke, M.A., Schäfer, K., Christen, S., Langbein, H., Gunßer, W.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 1997
Subjects
Manganese ferrite
X-ray absorption spectroscopy
XANES
Manganese ferrite
XANES
X-ray absorption spectroscopy
MnFe 2O 4
Online AccessGet full text

Cover

More Information
Summary:MnFe 2O 4 samples were prepared by the thermal decomposition of a freeze-dried MnFe 2-formate precursor. Depending on the decomposition conditions, such as temperature and oxygen partial pressure, ferrites with different oxidation state and cation distribution were formed. X-ray absorption spectra of the ferrite samples were recorded at the FeK- and MnK-edges to determine the Fe- and Mn-valence states. The site occupation ratio of Fe cations on tetrahedral (A) and octahedral (B) sites of the spinel structure was obtained from Mössbauer spectra taken at 4.2 K in an external magnetic field of 6 tesla.
ISSN:0167-2738
1872-7689
DOI:10.1016/S0167-2738(97)84052-0