TY - JOUR
KW - Energy
KW - Electrochemistry
KW - Global climate
KW - Unclassified drug
KW - Electric field
KW - Article
KW - Chemical structure
KW - Priority journal
KW - Bismuth
KW - Ferrite
KW - Piezoelectricity
KW - Bismuth ferrite
KW - Electricity generation
KW - Electromagnetic field
KW - Bismuth derivative
KW - Surface property
KW - Morphotype
KW - Molecular mechanics
AU - R.J Zeches
AU - M.D Rossell
AU - J.X Zhang
AU - A.J Hatt
AU - Q He
AU - C.-H Yang
AU - A Kumar
AU - C.H Wang
AU - A Melville
AU - C Adamo
AU - G Sheng
AU - Y.-H Chu
AU - J.F Ihlefeld
AU - R Erni
AU - C Ederer
AU - V Gopalan
AU - L.Q Chen
AU - D.G Schldin
AU - N.A Spaldin
AU - L.W Martin
AU - Ramamoorthy Ramesh
AB - Piezoelectric materials, which convert mechanical to electrical energy and vice versa, are typically characterized by the intimate coexistence of two phases across a morphotropic phase boundary. Electrically switching one to the other yields large electromechanical coupling coefficients. Driven by global environmental concerns, there is currently a strong push to discover practical lead-free piezoelectrics for device engineering. Using a combination of epitaxial growth techniques in conjunction with theoretical approaches, we show the formation of a morphotropic phase boundary through epitaxial constraint in lead-free piezoelectric bismuth ferrite (BiFeO3) films. Electric field-dependent studies show that a tetragonal-like phase can be reversibly converted into a rhombohedral-like phase, accompanied by measurable displacements of the surface, making this new lead-free system of interest for probe-based data storage and actuator applications.
BT - Science
DO - 10.1126/science.1177046
LA - eng
M1 - 5955
N1 - cited By 780
N2 - Piezoelectric materials, which convert mechanical to electrical energy and vice versa, are typically characterized by the intimate coexistence of two phases across a morphotropic phase boundary. Electrically switching one to the other yields large electromechanical coupling coefficients. Driven by global environmental concerns, there is currently a strong push to discover practical lead-free piezoelectrics for device engineering. Using a combination of epitaxial growth techniques in conjunction with theoretical approaches, we show the formation of a morphotropic phase boundary through epitaxial constraint in lead-free piezoelectric bismuth ferrite (BiFeO3) films. Electric field-dependent studies show that a tetragonal-like phase can be reversibly converted into a rhombohedral-like phase, accompanied by measurable displacements of the surface, making this new lead-free system of interest for probe-based data storage and actuator applications.
PY - 2009
SP - 977
EP - 980
T2 - Science
TI - A strain-driven morphotropic phase boundary in bifeO3
VL - 326
SN - 00368075
ER -