A Strain-Driven Morphotropic Phase Boundary in BiFeO3


Autoria(s): Zeches, R. J.; Rossell, M. D.; Zhang, J. X.; Hatt, A. J.; He, Q.; Yang, C. -H.; Kumar, A.; Wang, C. H.; Melville, A.; Adamo, C.; Sheng, G.; Chu, Y. -H.; Ihlefeld, J. F.; Erni, R.; Ederer, C.; Gopalan, V.; Chen, L. Q.; Schlom, D. G.; Spaldin, N. A.; Martin, L. W.; Ramesh, R.
Data(s)

13/11/2009

Resumo

<p>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.</p>

Identificador

http://pure.qub.ac.uk/portal/en/publications/a-straindriven-morphotropic-phase-boundary-in-bifeo3(aa9f1810-457c-4129-bb39-75808014f43a).html

http://dx.doi.org/10.1126/science.1177046

Idioma(s)

eng

Direitos

info:eu-repo/semantics/restrictedAccess

Fonte

Zeches , R J , Rossell , M D , Zhang , J X , Hatt , A J , He , Q , Yang , C -H , Kumar , A , Wang , C H , Melville , A , Adamo , C , Sheng , G , Chu , Y -H , Ihlefeld , J F , Erni , R , Ederer , C , Gopalan , V , Chen , L Q , Schlom , D G , Spaldin , N A , Martin , L W & Ramesh , R 2009 , ' A Strain-Driven Morphotropic Phase Boundary in BiFeO3 ' Science , vol 326 , no. 5955 , pp. 977-980 . DOI: 10.1126/science.1177046

Tipo

article