Mössbauer study of magnetism in Fe3Se4

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Pohjonen R, Mustonen O, Karppinen M, Linden J
Publisher: ELSEVIER SCIENCE SA
Publication year: 2018
Journal: Journal of Alloys and Compounds
Journal acronym: J ALLOY COMPD
Volume number: 746
Start page: 135
End page: 139
Number of pages: 5
ISSN: 0925-8388


Abstract

We have investigated the magnetism of ferrimagnetic Fe3Se4. A monoclinic Fe3Se4 powder sample was synthesized using an ampule technique. Magnetic properties were studied using Fe-57 Mossbauer spectroscopy measurements. The spectra were recorded between 77 and 360 K. Fitting could be done using four spectral components: two for each iron site in the lattice, or using only two components, each with a correlated distribution of the hyperfine parameters. Using the latter method the hyperfine parameter sets for each component were obtained from two distributions, tentatively taken as the local iron charge, i.e. the spectra were analyzed assuming the presence of a modulation of the iron valence. The crystal-lographic 1:2 ratio of the iron sites is reflected in the intensities of the magnetic Mossbauer spectra, whether one is using two or four components, but above TC only the "correlated" two-component fitting was successful.


Keywords

Fe-57 Mossbauer spectroscopy, Ferrimagnetism, Fractional valence, Iron selenide, P

Last updated on 2020-27-01 at 03:29