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          Institute: MPI für Chemische Physik fester Stoffe     Collection: publications 2013     Display Documents



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ID: 670789.0, MPI für Chemische Physik fester Stoffe / publications 2013
Magnetic phase transitions and iron valence
in the double perovskite Sr2FeOsO6
Authors:Adler, P.; Ksenofontov, V.; Paul, A. K.; Reehuis, M.; Yan, B.; Jansen, M.; Felser, C.
Language:English
Date of Publication (YYYY-MM-DD):2013-10-30
Title of Journal:Hyperfine Interactions
Review Status:not specified
Abstract / Description:Abstract The insulating and antiferromagnetic double perovskite Sr2FeOsO6 has
been studied by 57Fe Mössbauer spectroscopy between 5 and 295 K. The iron
atoms are essentially in the Fe3+ high spin (t2g
3eg
2) and thus the osmium atoms in
the Os5+
(t2g
3) state. Two magnetic phase transitions, which according to neutron
diffraction studies occur below TN = 140 K and T2 = 67 K, give rise to magnetic
hyperfine patterns, which differ considerably in the hyperfine fields and thus, in
the corresponding ordered magnetic moments. The evolution of hyperfine field
distributions, average values of the hyperfine fields, and magnetic moments with
temperature suggests that the magnetic state formed below TN is strongly frustrated.
The frustration is released by a magneto-structural transition which below T2 leads
to a different spin sequence along the c-direction of the tetragonal crystal structure.
External Publication Status:published
Document Type:Article
Communicated by:Ina Werner
Affiliations:MPI für chemische Physik fester Stoffe
Identifiers:DOI:10.1007/s10751-013-0922-6
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