Observation of rotation of polarization in thin films of Pb(Sc1/2Nb1/2)0-3-PbTi03 via a monoclinic phase - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Japanese Journal of Applied Physics, part 2 : Letters Année : 2006

Observation of rotation of polarization in thin films of Pb(Sc1/2Nb1/2)0-3-PbTi03 via a monoclinic phase

Résumé

Using a simple methodology based on the classical Bragg–Brentano X-ray geometry we have evidenced at room temperature a pseudo-cubic phase and a monoclinic (Pm) phase in thin films of PbSc1/2Nb1/2O3 (PSN) and (PbSc1/2Nb1/2O3)0.57–(PbTiO3)0.43 (PSN–PT) respectively, the latter compound corresponding to a morphotropic phase boundary (MPB) composition. Depending on the substrate and the thickness, different domains configuration are obtained. Competition between epitaxial and thermal stress induces a complex structural evolution with temperature which is different from that of ceramic samples. Indeed PSN films transform from a pseudo-cubic (triclinic) phase towards a cubic phase whereas in PSN–PT, a succession of transformations from a pure Pm phase toward a tetragonal (possibly non polar) phase is observed, a cubic phase never being reached up to 950 K.
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Dates et versions

hal-00143173 , version 1 (24-04-2007)

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Raphaël Haumont, Charlotte Malibert, Brahim Dkhil, Jean-Michel Kiat, François Lemarrec, et al.. Observation of rotation of polarization in thin films of Pb(Sc1/2Nb1/2)0-3-PbTi03 via a monoclinic phase. Japanese Journal of Applied Physics, part 2 : Letters, 2006, 45 (1-3), pp.L42-L45. ⟨10.1143/JJAP.45.L42⟩. ⟨hal-00143173⟩
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