TY - JOUR
KW - Lead
KW - Transmission electron microscopy
KW - Health risks
KW - Iron compounds
KW - Bismuth compounds
KW - Article
KW - Priority journal
KW - Morphotropic phase boundaries
KW - High resolution transmission electron microscopy
KW - Electric activity
KW - Bismuth
KW - Piezoelectricity
KW - Ferric oxide
KW - Nanoanalysis
KW - Piezoelectric materials
KW - In situ processing
KW - Mechanical actuators
KW - Piezoelectric actuators
KW - Strain
KW - Electric-field-induced strain
KW - Field-induced strain
KW - In situ transmission electron microscopies
KW - Lead-based materials
KW - Lead-free piezoelectric materials
KW - Mechanical response
KW - Sensors and actuators
KW - Health hazard
AU - J.X Zhang
AU - B Xiang
AU - Q He
AU - J Seidel
AU - R.J Zeches
AU - P Yu
AU - S.Y Yang
AU - C.H Wang
AU - Y.-H Chu
AU - L.W Martin
AU - A.M Minor
AU - Ramamoorthy Ramesh
AB - Piezoelectric materials exhibit a mechanical response to electrical inputs, as well as an electrical response to mechanical inputs, which makes them useful in sensors and actuators1. Lead-based piezoelectrics demonstrate a large mechanical response, but they also pose a health risk2. The ferroelectric BiFeO3 is an attractive alternative because it is lead-free, and because strain can stabilize BiFeO3 phases with a structure that resembles a morphotropic phase boundary3. Here we report a reversible electric-field-induced strain of over 5% in BiFeO 3 films, together with a characterization of the origins of this effect. In situ transmission electron microscopy coupled with nanoscale electrical and mechanical probing shows that large strains result from moving the boundaries between tetragonal- and rhombohedral-like phases, which changes the phase stability of the mixture. These results demonstrate the potential of BiFeO3 as a substitute for lead-based materials in future piezoelectric applications. © 2011 Macmillan Publishers Limited. All rights reserved.
BT - Nature Nanotechnology
DO - 10.1038/nnano.2010.265
LA - eng
M1 - 2
N1 - cited By 217
N2 - Piezoelectric materials exhibit a mechanical response to electrical inputs, as well as an electrical response to mechanical inputs, which makes them useful in sensors and actuators1. Lead-based piezoelectrics demonstrate a large mechanical response, but they also pose a health risk2. The ferroelectric BiFeO3 is an attractive alternative because it is lead-free, and because strain can stabilize BiFeO3 phases with a structure that resembles a morphotropic phase boundary3. Here we report a reversible electric-field-induced strain of over 5% in BiFeO 3 films, together with a characterization of the origins of this effect. In situ transmission electron microscopy coupled with nanoscale electrical and mechanical probing shows that large strains result from moving the boundaries between tetragonal- and rhombohedral-like phases, which changes the phase stability of the mixture. These results demonstrate the potential of BiFeO3 as a substitute for lead-based materials in future piezoelectric applications. © 2011 Macmillan Publishers Limited. All rights reserved.
PB - Nature Publishing Group
PY - 2011
SP - 98
EP - 102
T2 - Nature Nanotechnology
TI - Large field-induced strains in a lead-free piezoelectric material
VL - 6
SN - 17483387
ER -