TY - JOUR
KW - Thin films
KW - Raman scattering
KW - Phase transitions
KW - Bismuth compounds
KW - Single crystals
KW - Antiferromagnetic materials
KW - Antiferromagnetic phase transition
KW - Phonon coupling
AU - M.O Ramirez
AU - M Krishnamurthi
AU - S Denev
AU - A Kumar
AU - S.-Y Yang
AU - Y.-H Chu
AU - E Saiz
AU - J Seidel
AU - A.P Pyatakov
AU - A Bush
AU - D Viehland
AU - J Orenstein
AU - Ramamoorthy Ramesh
AU - V Gopalan
AB - 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.
BT - Applied Physics Letters
DO - 10.1063/1.2829681
LA - eng
M1 - 2
N1 - cited By 94
N2 - 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.
PY - 2008
T2 - Applied Physics Letters
TI - Two-phonon coupling to the antiferromagnetic phase transition in multiferroic BiFeO3
VL - 92
SN - 00036951
ER -