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Title: Magnetoelastic distortion of multiferroic BiFeO3 in the canted antiferromagnetic state

Journal Article · · Physical Review. B
ORCiD logo [1];  [1];  [1]; ORCiD logo [1];  [2]; ORCiD logo [3];  [4];  [2];  [5];  [6]; ORCiD logo [6];  [7];  [7]; ORCiD logo [7];  [8];  [9];  [9];  [9]; ORCiD logo [10]; ORCiD logo [11]
  1. National Inst. of Chemical Physics and Biophysics, Tallinn (Estonia)
  2. Budapest Univ. of Technology and Economics (Hungary); Hungarian Academy of Sciences, Budapest (Hungary)
  3. Budapest Univ. of Technology and Economics (Hungary); Vienna Univ. of Technology (Austria)
  4. Budapest Univ. of Technology and Economics (Hungary); RIKEN Center for Emergent Matter Science (CEMS), Wako (Japan)
  5. Budapest Univ. of Technology and Economics (Hungary); Univ. of Augsburg (Germany)
  6. Radboud Univ., Nijmegen (Netherlands)
  7. Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)
  8. Florida A & M University, Tallahassee, FL (United States)
  9. National Inst. of Advanced Industrial Science and Technology (AIST), Tsukuba (Japan)
  10. Augusta Univ., GA (United States)
  11. 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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