@article{33487,
  keywords = {Transmission electron microscopy, Room temperature, Polarization, Ferroelectricity, Ferroelectric polarization, First-principles calculation, Scanning transmission electron microscopy, X-ray absorption spectroscopy, Experimental evidence, Lone pair electrons, Oxygen octahedra},
  author = {J.X Zhang and Q He and M Trassin and W Luo and D Yi and M.D Rossell and P Yu and L You and C.H Wang and C.Y Kuo and J.T Heron and Z Hu and R.J Zeches and H.J Lin and A Tanaka and C.T Chen and L.H Tjeng and Y.-H Chu and Ramamoorthy Ramesh},
  title = {Microscopic origin of the giant ferroelectric polarization in tetragonal-like BiFeO3},
  abstract = {We report direct experimental evidence for a room-temperature, ∼130μC/cm2 ferroelectric polarization from the tetragonal-like BiFeO 3 phase. The physical origin of this remarkable enhancement of ferroelectric polarization has been investigated by a combination of x-ray absorption spectroscopy, scanning transmission electron microscopy, and first principles calculations. A large strain-induced Fe-ion displacement relative to the oxygen octahedra, combined with the contribution of Bi 6s lone pair electrons, is the mechanism driving the large ferroelectric polarization in this tetragonal-like phase. © 2011 American Physical Society.},
  year = {2011},
  journal = {Physical Review Letters},
  volume = {107},
  number = {14},
  issn = {00319007},
  doi = {10.1103/PhysRevLett.107.147602},
  note = {cited By 186},
  language = {eng},
}