P
Philippe Boullay
Researcher at Centre national de la recherche scientifique
Publications - 47
Citations - 1217
Philippe Boullay is an academic researcher from Centre national de la recherche scientifique. The author has contributed to research in topics: Chemistry & Perovskite (structure). The author has an hindex of 14, co-authored 31 publications receiving 1042 citations. Previous affiliations of Philippe Boullay include University of Rennes & École nationale supérieure d'ingénieurs de Caen.
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Reinvestigation of Phase Transitions in Na0.5Bi0.5TiO3 by TEM. Part I: First Order Rhombohedral to Orthorhombic Phase Transition
TL;DR: In this article, it was shown that the rhombohedral to tetragonal phase transition in Na0.5Bi 0.5TiO3 (NBT) is a two-step process.
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Hydrogen positions in single nanocrystals revealed by electron diffraction
Lukáš Palatinus,Petr Brázda,Philippe Boullay,Olivier Perez,Mariana Klementová,Sebastien Petit,Václav Eigner,Moussa Zaarour,Svetlana Mintova +8 more
TL;DR: The direct localization of hydrogen atoms in nanocrystalline materials is reported using the recently developed approach of dynamical refinement of precession electron diffraction tomography data, which demonstrates that the technique can reliably reveal fine structural details, including the positions of hydrogen atom in single crystals with micro- to nanosized dimensions.
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Structure refinement using precession electron diffraction tomography and dynamical diffraction: tests on experimental data.
Lukáš Palatinus,Cinthia Antunes Corrêa,Gwladys Steciuk,Damien Jacob,Pascal Roussel,Philippe Boullay,Mariana Klementová,Mauro Gemmi,Jaromír Kopeček,M. Chiara Domeneghetti,Fernando Cámara,Václav Petříček +11 more
TL;DR: A large series of tests revealed that the method provides structure models with an average error in atomic positions typically between 0.01 and 0.02 Å, which is significantly more accurate than models obtained by refinement using kinematical approximation for the calculation of model intensities.
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Absence of long-range Ni/Mn ordering in ferromagnetic La2NiMnO6 thin films
M. P. Singh,Clara Grygiel,W. C. Sheets,Philippe Boullay,M. Hervieu,Wilfrid Prellier,B. Mercey,Ch. Simon,B. Raeau +8 more
TL;DR: In this paper, a discusion on the presence of Ni/Mn long-range ordering in double perovskites La2NiMnO6 is presented, in light of the recent literature on double-perovskite La2NmO6.
The structural origin of the antiferroelectric properties and relaxor behavior of Na0.5 Bi0.5 TiO3
TL;DR: In this article, it was shown that the phase transition from rhombohedral to tetragonal phase transition in NBT is in fact a two-step phase transition, with the first order phase transition involving the reconstructive transformation of the rhombohedric phase into an orthorhombic one, through the formation of an intermediate modulated phase.