Record link: 
http://hdl.handle.net/20.500.12708/141886
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Title: 
Magnetoelastic distortion of multiferroic BiFeO₃ in the canted antiferromagnetic state
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Citation: 
Rõõm, T., Viirok, J., Peedu, L., Farkas, D. G., Szaller, D., Kocsis, V., Bordács, S., Kézsmárki, I., Kamenskyi, D. L., Engelkamp, H., Ozerov, M., Smirnov, D., Krzystek, J., Thirunavukkuarasu, K., Ozaki, Y., Tomioka, Y., Ito, T., Datta, T., & Fishman, R. S. (2020). Magnetoelastic distortion of multiferroic  BiFeO₃ in the canted antiferromagnetic state. Physical Review B, 102(21), Article 214410. https://doi.org/10.1103/physrevb.102.214410
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Publisher DOI: 
10.1103/physrevb.102.214410
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Publication Type: 
Article - Original Research Article
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Language: 
English
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Authors: 
Rõõm, T. 
Viirok, J. 
Peedu, L. 
Farkas, D. G. 
Szaller, David 
Kocsis, V. 
Bordács, S. 
Kézsmárki, I. 
Kamenskyi, D. L. 
Engelkamp, H. 
Ozerov, M. 
Smirnov, D. 
Krzystek, J. 
Thirunavukkuarasu, K. 
Ozaki, Y. 
Tomioka, Y. 
Ito, T. 
Datta, T. 
Fishman, R. S. 
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Organisational Unit: 
E138-05 - Forschungsbereich Solid State Spectroscopy 
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Journal: 
Physical Review B 
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ISSN: 
2469-9950
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Date (published): 
9-Dec-2020
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Number of Pages: 
8
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Peer reviewed: 
Yes
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Keywords: 
löschen
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Abstract: 
Using THz spectroscopy, we show that the spin-wave spectrum of multiferroic BiFeO3 in its high-field canted antiferromagnetic state is well described by a spin model that violates rhombohedral symmetry. We demonstrate that the monoclinic distortion of the canted antiferromagnetic state is induced by the single-ion magnetoelastic coupling between the lattice and the two nearly antiparallel spins. The revised spin model for BiFeO3 contains two new single-ion anisotropy terms that violate rhombohedral symmetry and depend on the direction of the magnetic field.
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Research Areas: 
Structure-Property Relationship: 100%
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Science Branch: 
Physik, Astronomie
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