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M. Reissner, W. Steiner, H. Boller:
"⁵⁷Fe Mössbauer investigation of K_0.30Ba_0.7Fe₂S₃ ";
Journal of Alloys and Compounds, 383 (2004), S. 131 - 134.

57Fe Mössbauer investigation of K0.3Ba0.7Fe2S3

M. Reissnera, W. SteinerCorresponding Author Contact Information, E-mail The Corresponding Author, a and H. Bollerb

a Institut für Festkörperphysik, Technische Universität Wien, Wiedner Hauptstrasmall beta, Greeke 8-10, A-1040, Wien, Austria
b Institut für Chemie, Johannes Kepler Universität Linz, Altenberger Straße 69, A-4040, Linz, Austria

Available online 17 June 2004.


Abstract

57Fe Mössbauer investigations are reported for K0.3Ba0.7Fe2S3 and compared with the unsubstituted compound BaFe2S3 in the temperature interval 4.2 < T < 293 K. According to the temperature dependence of the quadrupole splitting and the value of the centre shift (CS) both samples can be characterised as mixed valence compounds. A weakening in stiffness of the Fe sublattice follows from the decrease in Debye temperature (30 K), if Ba is substituted by K. The ordering temperature, determined from the appearance of a magnetic hyperfine split component, is roughly 40 K lower than the one for BaFe2S3 indicating a strong influence of the interspersed cations on the magnetic exchange interaction.

http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC04970161

doi:10.1016/j.jallcom.2004.04.022