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Article Dans Une Revue Physical Review Letters Année : 2008

High-Pressure Effect on PbTiO3 : An Investigation by Raman and X-Ray Scattering up to 63 GPa

Résumé

We report a room-temperature high-pressure x-ray and Raman scattering investigation of lead titanate (PbTiO3) up to 63 GPa. Three continuous phase transitions at 13, 20, and 45 GPa between tetragonal-like phases occur. As a result, no evidence is found for a pressure-induced morphotropic phase boundary. Our study provides experimental evidence that PbTiO3 presents a complex sequence of phases accommodating pressure through mechanisms involving oxygen octahedra tilting and reentrance of ferroelectricity.
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Dates et versions

hal-00357963 , version 1 (26-01-2018)

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Pierre-Eymeric Janolin, P. Bouvier, J. Kreisel, P.A. Thomas, Igor A. Kornev, et al.. High-Pressure Effect on PbTiO3 : An Investigation by Raman and X-Ray Scattering up to 63 GPa. Physical Review Letters, 2008, 101 (23), pp.237601. ⟨10.1103/PhysRevLett.101.237601⟩. ⟨hal-00357963⟩
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