@article{33560,
  author = {X.S Xu and T.V Brinzari and S Lee and Y.H Chu and L.W Martin and A Kumar and S McGill and R.C Rai and Ramamoorthy Ramesh and V Gopalan and S.W Cheong and J.L Musfeldt},
  title = {Optical properties and magnetochromism in multiferroic BiFeO3},
  abstract = {In order to investigate spin-charge coupling in multiferroic oxides, we measured the optical properties of BiFeO3. Although the direct 300 K charge gap is observed at 2.67 eV, absorption onset actually occurs at much lower energy with Fe3+ excitations at 1.41 and 1.90 eV. Temperature and magnetic-field- induced spectral changes reveal complex interactions between on-site crystal-field and magnetic excitations in the form of magnon sidebands. We employ the sensitivity of these magnon sidebands to map out the magnetic-field-temperature phase diagram which demonstrates optical evidence for spin spiral quenching above 20 T and suggests a spin domain reorientation near 10 T. © 2009 The American Physical Society.},
  year = {2009},
  journal = {Physical Review B - Condensed Matter and Materials Physics},
  volume = {79},
  number = {13},
  issn = {10980121},
  doi = {10.1103/PhysRevB.79.134425},
  note = {cited By 119},
  language = {eng},
}