Study ofAandBsites order in lanthanide-doped lead titanate ferroelectric system
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Pb0.88Ln0.08TiO3ferroelectric system, whereLn= 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 modeE(1TO) was evaluated as a function of the rare earths’ ionic radius suggesting partial occupation of lanthanide ions at theAandBsites of the perovskite structure. Using Rietveld refinements, it has been established a higher incorporation of Ln3+ions into theAsites of the perovskite structure than that of theBsites for the studied ceramics. The occupation atBsites increases slightly with the decreases of the ionic radii of the lanthanides.
2011 ◽
Vol 67
(5)
◽
pp. 409-415
◽
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