Volume 5, Issue 3-1, May 2017, Page: 18-21
Synchrotron-Radiation Photoemission Study of the Ba Atomic Layer Deposition on Multiferroic BiFeO3
G. Benemanskaya, Department of Solid State Physics, Ioffe Institute, St. Petersburg, Russia
P. Dementev, Department of Solid State Physics, Ioffe Institute, St. Petersburg, Russia
G. Iluridze, Department of Engineering Physics, Georgian Technical University, Tbilisi, Georgia
T. Minashvili, Department of Engineering Physics, Georgian Technical University, Tbilisi, Georgia
G. Frank–Kamenetskaya, Department of Analytical Chemistry, St. Petersburg State Technological Institute, St. Petersburg, Russia
Received: Dec. 6, 2016;       Accepted: Dec. 7, 2016;       Published: Jan. 6, 2017
DOI: 10.11648/j.nano.s.2017050301.15      View  2457      Downloads  78
Abstract
Electronic structure of ceramic BiFeO3O surface and Ba / BiFeO3 interface has been investigated in situ in an ultrahigh vacuum via synchrotron-based photoemission spectroscopy within the range of excited photon energy from 120 to 850 eV. The photo emission from the valence band and from Bi 4f, Fe 2p, and Ba 4d core-levels were studied. An effect of Ba atomic layer deposition is found to induce a significant change in all spectra that is originated from the strong interaction with charge transfer between Fe, Bi surface atoms and Ba adatoms. It is obtained that the Fe 2p 3/2 core-level spectrum for the clean BiFeO3 sample contains both the Fe2+ and Fe3+ ion components with atomic ratio of Fe2+ / Fe3+ ~ 1. The Ba adsorption is found to increase the Fe2+ / Fe3+ ratio up to ~ 1.5 that clearly exhibits recharge between Fe3+ ↔ Fe2+ ions and possibility to enhance the ferroelectric polarization.
Keywords
Electronic Structure, Surface, Ba / BiFeO3 Interface, Synchrotron-Photoemission Spectroscopy
To cite this article
G. Benemanskaya, P. Dementev, G. Iluridze, T. Minashvili, G. Frank–Kamenetskaya, Synchrotron-Radiation Photoemission Study of the Ba Atomic Layer Deposition on Multiferroic BiFeO3, American Journal of Nano Research and Applications. Special Issue:Nanotechnologies. Vol. 5, No. 3-1, 2017, pp. 18-21. doi: 10.11648/j.nano.s.2017050301.15
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