@article{33592,
  keywords = {Thin films, Raman scattering, Phase transitions, Bismuth compounds, Single crystals, Antiferromagnetic materials, Antiferromagnetic phase transition, Phonon coupling},
  author = {M.O Ramirez and M Krishnamurthi and S Denev and A Kumar and S.-Y Yang and Y.-H Chu and E Saiz and J Seidel and A.P Pyatakov and A Bush and D Viehland and J Orenstein and Ramamoorthy Ramesh and V Gopalan},
  title = {Two-phonon coupling to the antiferromagnetic phase transition in multiferroic BiFeO3},
  abstract = {A prominent band centered at ∼1000-1300 cm-1 and associated with resonant enhancement of two-phonon Raman scattering is reported in multiferroic BiFe O3 thin films and single crystals. A strong anomaly in this band occurs at the antiferromagnetic Neel temperature, TN ∼375 °C. This band is composed of three peaks, assigned to 2 A4, 2 E8, and 2 E9 Raman modes. While all three peaks were found to be sensitive to the antiferromagnetic phase transition, the 2 E8 mode, in particular, nearly disappears at TN on heating, indicating a strong spin-two-phonon coupling in BiFe O3. © 2008 American Institute of Physics.},
  year = {2008},
  journal = {Applied Physics Letters},
  volume = {92},
  number = {2},
  issn = {00036951},
  doi = {10.1063/1.2829681},
  note = {cited By 94},
  language = {eng},
}