Synchrotron x-ray scattering evidence for interlayer structural coupling in (PbMg1/3Nb2/3O3)(1−x)/(PbTiO3)x superlattices

Nathalie Lemee (1) , Eric Dooryhee (2) , Houssny Bouyanfif (1) , Françoise Le Marrec (1) , Maud Nemoz (3) , Jean-Louis Hodeau (2) , Michael G. Karkut (1)

1 LPMC - Laboratoire de Physique de la Matière Condensée - UR UPJV 2081
2 NEEL - MRS - Matériaux, Rayonnements, Structure
3 CRHEA - Centre de recherche sur l'hétéroepitaxie et ses applications

We present evidence for in-plane coupling in relaxor PbMg1/3Nb2/3O3 / ferroelectric PbTiO3 superlattices [PMN(1−x)Lambda/PTxLambda]10. For constant superlattice wavelength Lambda=dPMN+dPT, we find that by varying the constituents thicknesses dPMN and dPT a significant effect is observed on the internal a1/a2 domain structure of the PT layers as well as on the appearance of domains in PMN. Since the strain effects on the structural patterns can be modulated by adjusting x, this is one way to control the polarization axis on a nanoscale level.

Mots clés: superlattice; relaxor; ferroelectric; diffraction; strain; polarisation

Domaines: Science des matériaux [cond-mat.mtrl-sci]

Nathalie Lemee, Eric Dooryhee, Houssny Bouyanfif, Françoise Le Marrec, Maud Nemoz, et al.. Synchrotron x-ray scattering evidence for interlayer structural coupling in (PbMg1/3Nb2/3O3)(1−x)/(PbTiO3)x superlattices. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2008, 78, pp.140102-140105. ⟨10.1103/PhysRevB.78.140102⟩. ⟨hal-00188451⟩