Stress and orientation in the relaxor/ferroelectric superlattices (PbMg1/3Nb2/3O3)((1-x)Lambda)/(PbTiO3)(x Lambda) - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2005

Stress and orientation in the relaxor/ferroelectric superlattices (PbMg1/3Nb2/3O3)((1-x)Lambda)/(PbTiO3)(x Lambda)

Résumé

We have grown a series of [PbMg1/3Nb2/3O3]((1-x)Lambda)/[PbTiO3](xLambda)(PMN1-x/PTx) superlattices for which the composition varies, 0.1less than or equal toxless than or equal to0.8, but the modulation period Lambda is kept constant at about 130 A. X-ray diffraction indicates that the polar c axis of the PT layers lies in the plane of the films. The Raman spectra, which reflect the sum of the spectra of PMN and the PT layers, confirm the a-domain orientation of the PT layers. A downshift of the E(1TO) soft mode of the PT layers was attributed to tensile stress, estimated to be in the range of 2.5-3.6 GPa, induced by the lattice mismatch of PMN/PT layers. We observe the splitting of the "silent" mode in PT into distinct modes B-1 and E and attribute this to the strains present in the layers.
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hal-00126126 , version 1 (23-01-2007)

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Houssny Bouyanfif, Mimoun El Marssi, Françoise Le Marrec, Michael G. Karkut, Nathalie Lemee, et al.. Stress and orientation in the relaxor/ferroelectric superlattices (PbMg1/3Nb2/3O3)((1-x)Lambda)/(PbTiO3)(x Lambda). Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2005, 71 (2), pp.Art. No. 020103. ⟨10.1103/PhysRevB.71.020103⟩. ⟨hal-00126126⟩
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