Breuning, D., Froehlich, T., Gorkov, D., Cisarova, I., Skourski, Y., Rossi, L., Bryant, B., Wiedmann, S., Meven, M., Ushakov, A., Streltsov, S. V., Khomskii, D., Becker, P., Bohaty, L., Braden, M. and Lorenz, T. (2021). Multiple field-induced phases in the frustrated triangular magnet Cs3Fe2Br9. Phys. Rev. B, 104 (6). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

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Abstract

The recently discovered material Cs3Fe2Br9 contains Fe2Br9 bi-octahedra forming triangular layers with hexagonal stacking along the c axis. In contrast to isostructural Cr-based compounds, the zero-field ground state is not a nonmagnetic S = 0 singlet-dimer state. Instead, the Fe2Br9 bi-octahedra host semiclassical S = 5/2 Fe3+ spins with a pronounced easy-axis anisotropy along c, and interestingly, the intradimer spins are ordered ferromagnetically. The high degree of magnetic frustration due to (various) competing intradimer and interdimer couplings leads to a surprisingly rich magnetic phase diagram. The zero-field ground state is already reached via an intermediate phase, and the high-field magnetization and thermal expansion data for H parallel to c identify 10 different ordered phases. Among them are phases with constant magnetization of 1/3, respectively 1/2, of the saturation value, and several transitions are strongly hysteretic with pronounced length changes, reflecting strong magnetoelastic coupling.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Breuning, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Froehlich, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gorkov, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cisarova, I.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Skourski, Y.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rossi, L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bryant, B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wiedmann, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Meven, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ushakov, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Streltsov, S. V.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Khomskii, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Becker, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bohaty, L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Braden, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lorenz, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-599097
DOI: 10.1103/PhysRevB.104.064418
Journal or Publication Title: Phys. Rev. B
Volume: 104
Number: 6
Date: 2021
Publisher: AMER PHYSICAL SOC
Place of Publication: COLLEGE PK
ISSN: 2469-9969
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
HEAT-CAPACITY; QUANTUMMultiple languages
Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed MatterMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/59909

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