Magnetic phase transitions and iron valence in the double perovskite Sr2FeOsO6

Peter Adler; Vadim Ksenofontov; Avijit Kumar Paul; Manfred Reehuis; Binghai Yan; Martin Jansen; Claudia Felser

doi:10.1007/s10751-013-0922-6

Magnetic phase transitions and iron valence in the double perovskite Sr₂FeOsO₆

Peter Adler, Vadim Ksenofontov, Avijit Kumar Paul, Manfred Reehuis, Binghai Yan, Martin Jansen, Claudia Felser

Physics

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

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 (t_2g³) and thus the osmium atoms in the Os⁵⁺(t_2g³) state. Two magnetic phase transitions, which according to neutron diffraction studies occur below T _N = 140 K and T ₂ = 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 T _N is strongly frustrated. The frustration is released by a magneto-structural transition which below T ₂ leads to a different spin sequence along the c-direction of the tetragonal crystal structure.

Original language	English (US)
Pages (from-to)	289-297
Number of pages	9
Journal	Hyperfine Interactions
Volume	226
Issue number	1-3
DOIs	https://doi.org/10.1007/s10751-013-0922-6
State	Published - Apr 2014

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics
Nuclear and High Energy Physics
Condensed Matter Physics
Physical and Theoretical Chemistry

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10.1007/s10751-013-0922-6

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title = "Magnetic phase transitions and iron valence in the double perovskite Sr2FeOsO6",

abstract = "The insulating and antiferromagnetic double perovskite Sr2FeOsO6 has been studied by 57Fe M{\"o}ssbauer spectroscopy between 5 and 295 K. The iron atoms are essentially in the Fe3+ high spin (t2g3) and thus the osmium atoms in the Os5+(t2g3) state. Two magnetic phase transitions, which according to neutron diffraction studies occur below T N = 140 K and T 2 = 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 T N is strongly frustrated. The frustration is released by a magneto-structural transition which below T 2 leads to a different spin sequence along the c-direction of the tetragonal crystal structure.",

author = "Peter Adler and Vadim Ksenofontov and Paul, {Avijit Kumar} and Manfred Reehuis and Binghai Yan and Martin Jansen and Claudia Felser",

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T1 - Magnetic phase transitions and iron valence in the double perovskite Sr2FeOsO6

AU - Adler, Peter

AU - Ksenofontov, Vadim

AU - Paul, Avijit Kumar

AU - Reehuis, Manfred

AU - Yan, Binghai

AU - Jansen, Martin

AU - Felser, Claudia

PY - 2014/4

Y1 - 2014/4

N2 - 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 (t2g3) and thus the osmium atoms in the Os5+(t2g3) state. Two magnetic phase transitions, which according to neutron diffraction studies occur below T N = 140 K and T 2 = 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 T N is strongly frustrated. The frustration is released by a magneto-structural transition which below T 2 leads to a different spin sequence along the c-direction of the tetragonal crystal structure.

AB - 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 (t2g3) and thus the osmium atoms in the Os5+(t2g3) state. Two magnetic phase transitions, which according to neutron diffraction studies occur below T N = 140 K and T 2 = 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 T N is strongly frustrated. The frustration is released by a magneto-structural transition which below T 2 leads to a different spin sequence along the c-direction of the tetragonal crystal structure.

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Magnetic phase transitions and iron valence in the double perovskite Sr₂FeOsO₆

Abstract

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