Magnetoelastic distortion of multiferroic BiFeO3 in the canted antiferromagnetic state
Journal Article
·
· Physical Review. B
- National Inst. of Chemical Physics and Biophysics, Tallinn (Estonia)
- Budapest Univ. of Technology and Economics (Hungary); Hungarian Academy of Sciences, Budapest (Hungary)
- Budapest Univ. of Technology and Economics (Hungary); Vienna Univ. of Technology (Austria)
- Budapest Univ. of Technology and Economics (Hungary); RIKEN Center for Emergent Matter Science (CEMS), Wako (Japan)
- Budapest Univ. of Technology and Economics (Hungary); Univ. of Augsburg (Germany)
- Radboud Univ., Nijmegen (Netherlands)
- Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)
- Florida A & M University, Tallahassee, FL (United States)
- National Inst. of Advanced Industrial Science and Technology (AIST), Tsukuba (Japan)
- Augusta Univ., GA (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
Using THz spectroscopy, here 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.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; European Regional Development Fund; Estonian Ministry of Education and Research Council Grants; Estonian Academy of Science; Hungarian Academy of Science; Hungarian Innovation Office (NKFIH); BME; Austrian Science Fund (FWF); German Research Foundation (DFG); SYSU; National Science Foundation (NSF)
- Grant/Contract Number:
- AC05-00OR22725; TK134; IUT23-03; PRG736; SNK-64/2013; K-124176; ANN-122879; BME-FIKP-NAT; 2816-N27; TRR-80; OEMT-2017-KF-06; DMR-1644779
- OSTI ID:
- 1755293
- Journal Information:
- Physical Review. B, Vol. 102, Issue 21; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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