用电子能谱法研究多晶和单晶PMN-PT中的阳离子环境

Proceedings of the 13th IEEE International Symposium on Applications of Ferroelectrics, 2002. ISAF 2002. Pub Date : 2002-05-28 DOI:10.1109/ISAF.2002.1195965

S. McBride, A. Bell

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引用次数: 1

摘要

本文主要研究了ABO/sub - 3/型钙钛矿弛豫剂基铁电单晶和多晶Pb(Mg/sub - 1/3/Nb/sub - 2/3/)O/sub - 3/-PbTiO/sub - 3/。电子能谱技术包括x射线光电子能谱(XPS)和电子能量损失能谱(EELS)在TEM中被用来研究化学环境和A和B位占用者的氧化态。用XPS测量了阳离子在其原生氧化物中的电子结合能在报告值上的变化，并用EELS确认了氧化态。总之，所报道的位移归因于电子极化，Pb/sup 2+/表现出最大的位移。

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Investigation of cation environments in polycrystalline and single crystal PMN-PT using electron spectroscopy

The present study has been focused on ABO/sub 3/ type perovskite relaxor based ferroelectric single crystals and polycrystalline forms of Pb(Mg/sub 1/3/Nb/sub 2/3/)O/sub 3/-PbTiO/sub 3/. 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 Pb/sup 2+/.

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来源期刊

Proceedings of the 13th IEEE International Symposium on Applications of Ferroelectrics, 2002. ISAF 2002.

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