@article{33544,
  keywords = {energy, Electrochemistry, global climate, unclassified drug, electric field, Article, chemical structure, priority journal, bismuth, ferrite, piezoelectricity, bismuth ferrite, electricity generation, electromagnetic field, bismuth derivative, surface property, morphotype, molecular mechanics},
  author = {R.J Zeches and M.D Rossell and J.X Zhang and A.J Hatt and Q He and C.-H Yang and A Kumar and C.H Wang and A Melville and C Adamo and G Sheng and Y.-H Chu and J.F Ihlefeld and R Erni and C Ederer and V Gopalan and L.Q Chen and D.G Schldin and N.A Spaldin and L.W Martin and Ramamoorthy Ramesh},
  title = {A strain-driven morphotropic phase boundary in bifeO3},
  abstract = {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.},
  year = {2009},
  journal = {Science},
  volume = {326},
  number = {5955},
  pages = {977-980},
  issn = {00368075},
  doi = {10.1126/science.1177046},
  note = {cited By 780},
  language = {eng},
}