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    • Two-phonon coupling to the antiferromagnetic phase transition in multiferroic BiFeO(3) 

      Ramirez, M. O.; Krishnamurthi, M.; Denev, S.; Kumar, Amit; Yang, S. Y.; Chu, Y. H.; Saiz, E.; Seidel, J.; Pyatakov, Alexander P.; Bush, A.; Viehland, Dwight D.; Orenstein, J.; Ramesh, R.; Gopalan, V. (AIP Publishing, 2008-01-01)
      A prominent band centered at similar to 1000-1300 cm(-1) and associated with resonant enhancement of two-phonon Raman scattering is reported in multiferroic BiFeO(3) thin films and single crystals. A strong anomaly in this ...