W L-III-edge XANES and EXAFS studies of Pb(Fe2/3W1/3)O-3-PbTiO3 multiferroic ceramics
Abstract: The local structure of Pb(Fe2/3W1/3)O3 (PFW) and Pb(Fe2/3W1/3)O3-PbTiO3 (PFW100xPT, x=0.10 and x=0.20) multiferroic ceramics was probed by X-ray absorption spectroscopy at the W LIII-edge. The analysis of XANES spectra did not show significative modifications in the intensity or energy of transitions as a function of temperature or PbTiO3 content. The fitting of EXAFS spectra of PFW samples revealed a local rhombohedral symmetry of W atoms around 120 K, which is consistent with the electrical properties of this compound. Concerning the local structure of W atoms in PFW100xPT samples, in all cases, at 290 K, a local tetragonal symmetry was determined although by X-ray diffraction a cubic local symmetry was expected.
Author(s): Mesquita, Alexandre; Fraygola, Barbara Maraston; Mastelaro, Valmor Roberto; et al.
15th International Conference on X-Ray Absorption Fine Structure
Volume: 430 Published: 2013
DOI: http://dx.doi.org/10.1088/1742-6596/430/1/012111
PDF: W L-III-edge XANES and EXAFS studies of Pb(Fe2 3W1 3)O-3-PbTiO3 multiferroic ceramics
