TY - JOUR
KW - Transmission electron microscopy
KW - Room temperature
KW - Polarization
KW - Ferroelectricity
KW - Ferroelectric polarization
KW - First-principles calculation
KW - Scanning transmission electron microscopy
KW - X-ray absorption spectroscopy
KW - Experimental evidence
KW - Lone pair electrons
KW - Oxygen octahedra
AU - J.X Zhang
AU - Q He
AU - M Trassin
AU - W Luo
AU - D Yi
AU - M.D Rossell
AU - P Yu
AU - L You
AU - C.H Wang
AU - C.Y Kuo
AU - J.T Heron
AU - Z Hu
AU - R.J Zeches
AU - H.J Lin
AU - A Tanaka
AU - C.T Chen
AU - L.H Tjeng
AU - Y.-H Chu
AU - Ramamoorthy Ramesh
AB - 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.
BT - Physical Review Letters
DO - 10.1103/PhysRevLett.107.147602
LA - eng
M1 - 14
N1 - cited By 186
N2 - 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.
PY - 2011
T2 - Physical Review Letters
TI - Microscopic origin of the giant ferroelectric polarization in tetragonal-like BiFeO3
VL - 107
SN - 00319007
ER -