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Título

Origin of the enhanced flexoelectricity of relaxor ferroelectrics

AutorNarváez, Jackeline ; Catalán, Gustau
Fecha de publicación23-abr-2014
EditorAmerican Institute of Physics
CitaciónApplied Physics Letters 104: 162903 (2014)
ResumenWe have measured the bending-induced polarization of Pb(Mg1/3 Nb2/3) O3-PbTiO3 single crystals with compositions at the relaxor-ferroelectri c phase boundary. The crystals display flexocoupling coefficients f>100 V, an order of magnitude bigger than the theoretical upper limit set by the theories of Kogan and Tagantsev. This enhancement persists in the paraphase up to a temperature T*¼500+-25K that coincides with the onset of anelastic softening in the crystals; above T*, the true (lattice-based) flexocoupling coefficient is measured as f13=10V for both compositions. Cross-correlation between flexoelectric, dielectric, and elastic properties indicates that the enhancement of bending-induced polarization of rel axor ferroelectrics is not caused by intrinsically giant flexoelectricity but by the reorientation of polar nanodomains that are ferroelastically active below T*. ©2014 AIP Publishing LLC.
Versión del editorhttp://dx.doi.org/10.1063/1.4871686
URIhttp://hdl.handle.net/10261/121303
DOI10.1063/1.4871686
ISSN0003-6951
E-ISSN1077-3118
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