WorldCat Identities

Hubault, Cécile

Overview
Works: 1 works in 2 publications in 1 language and 2 library holdings
Roles: Author
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Most widely held works by Cécile Hubault
Contrôle de la structure en domaines dans des super-réseaux ferroélectriques bicolores et tricolores by Cécile Hubault( Book )

2 editions published in 2011 in French and held by 2 WorldCat member libraries worldwide

The aim of this work has been to study the domain structure in bicolour and tricolour superlattices based on PbTiO3, PbZr1-xTixO3 PZT: PbZr0,2Ti0,8O3 and PbZr0,1Ti0,9O3) and SrTiO3. The samples were grown by pulsed laser deposition and the ferroelectric domain structure was studied by X-ray diffraction, transmission electron microscopy, and atomic force microscopy in the piezoresponse mode. For each family of superlattices, the superlattice parameters were adjusted to modify the mechanical strains and to determine their effects on the domain structure. In the bicolour superlattices PbTiO3/ PbZr0,2Ti0,8O3, mechanical strain is relaxed by 90° domain formation. We have demonstrated that this relaxation can be suppressed if the superlattice period and the sample thickness are below certain critical values. In addition we show that the stabilization of the monodomain structure is more favourable when the mismatch between PbTiO3 and PbZr1-xTixO3 diminishes as demonstrated by our results on PbTiO3/ PbZr0,1Ti0,9O3 superlattices. In the tricolour superlattices PbTiO3/SrTiO3/PbZr1-xTixO3, we have shown that a depolarization field exists in the ferroelectric materials induced by the 1 nm in thickness SrTiO3 layers. In the PbTiO3/PbZr0,2Ti0,8O3 superlattices, we have demonstrated that this depolarization field suppress the 90° domain structure and induces the formation of a 180° domain structure
 
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French (2)