Title :
Investigation of cation environments in polycrystalline and single crystal PMN-PT using electron spectroscopy
Author :
McBride, S.P. ; Bell, A.J.
Author_Institution :
Inst. of Mater. Res., Leeds Univ., UK
fDate :
28 May-1 June 2002
Abstract :
The present study has been focused on ABO3 type perovskite relaxor based ferroelectric single crystals and polycrystalline forms of Pb(Mg13/Nb23/)O3-PbTiO3. Electron spectroscopy techniques including X-ray Photoelectron Spectroscopy (XPS) and Electron Energy Loss Spectroscopy (EELS) in the TEM have been used to investigate chemical environments and oxidation states of the A and B site occupants. Shifts in electron binding energies over the reported values for the cations in their native oxides have been measured using XPS and the oxidation state confirmed using EELS. In conclusion, the reported shifts are attributed to electronic polarisation, the greatest shift being exhibited by Pb2+.
Keywords :
X-ray photoelectron spectra; binding energy; core levels; electron energy loss spectra; lead compounds; relaxor ferroelectrics; transmission electron microscopy; EELS; PMN-PbTiO3; PbMgO3NbO3-PbTiO3; TEM; XPS; binding energies; cation environments; chemical environments; core fine spectrum; crystal orientation dependence; electronic polarisation; ferroelectric single crystals; oxidation state; oxidation states; perovskite relaxor based ferroelectric; polycrystalline forms; site occupants; Chemicals; Crystals; Electrons; Energy loss; Energy measurement; Ferroelectric materials; Niobium; Oxidation; Polarization; Spectroscopy;
Conference_Titel :
Applications of Ferroelectrics, 2002. ISAF 2002. Proceedings of the 13th IEEE International Symposium on
Print_ISBN :
0-7803-7414-2
DOI :
10.1109/ISAF.2002.1195965
