کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5423651 1507946 2011 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Surface termination of BaTiO3 (001) single crystals: A combined electron spectroscopic and theoretical study
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Surface termination of BaTiO3 (001) single crystals: A combined electron spectroscopic and theoretical study
چکیده انگلیسی

The surface termination of oxide surfaces is of crucial importance for the growth of a second material like metals or other oxides. In this study we have investigated the surface of a BaTiO3 (001) single crystal during sample preparation by various electron spectroscopic methods. It is shown by X-ray photoelectron spectroscopy (XPS), ultraviolet photoelectron spectroscopy (UPS) and metastable induced electron spectroscopy (MIES) that during sputtering a Ba rich overlayer is formed, in which the Ba2+ ions are under coordinated. Below this layer, an oxygen deficient BaTiO3 layer is found. During annealing, we observe the reformation of the crystalline structure. UP and MIE spectra provide clear evidence of a BaO terminated surface. X-ray photoelectron diffraction studies support this result, comparing recorded polar angle scans with calculated intensity modulations using multiple scattering cluster models.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface Science - Volume 605, Issues 1–2, January 2011, Pages 158-165
نویسندگان
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