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Study of A and B sites order in lanthanide-doped lead titanate ferroelectric system

Abstract : Pb(0.88)Ln(0.08)TiO(3) ferroelectric system, where Ln = La, Sm, Eu, and Dy, has been characterized using Scanning Electron Microscopy, Raman spectroscopy, and X-ray diffraction experiments. Softening of the lowest transverse optical phonon mode E (1TO) was evaluated as a function of the rare earths' ionic radius suggesting partial occupation of lanthanide ions at the A and B sites of the perovskite structure. Using Rietveld refinements, it has been established a higher incorporation of Ln(3+) ions into the A sites of the perovskite structure than that of the B sites for the studied ceramics. The occupation at B sites increases slightly with the decreases of the ionic radii of the lanthanides. (C) 2016 International Centre for Diffraction Data.
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https://hal-u-picardie.archives-ouvertes.fr/hal-03627647
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Soumis le : vendredi 1 avril 2022 - 13:59:44
Dernière modification le : samedi 2 avril 2022 - 03:00:22

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A. Penton-Madrigal, Y. Mendez-Gonzalez, A. Pelaiz-Barranco, F. Calderon-Pinar, L. A. S. Oliveira, et al.. Study of A and B sites order in lanthanide-doped lead titanate ferroelectric system. POWDER DIFFRACTION, 2016, 31 (1), pp.23-30. ⟨10.1017/S0885715615000998⟩. ⟨hal-03627647⟩

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