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. 2017 Sep 22;10(10):1118. doi: 10.3390/ma10101118

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© 2017 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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High-resolution XPS spectra of BiFeO₃ and R40-BiFeO_3−x samples: (a) Bi 4f, (b) Fe 2p; O 1s high-resolution XPS spectra of BiFeO₃ (c), R20-BiFeO_3−x (d), R40-BiFeO_3−x (e), and R60-BiFeO_3−x (f).

High-resolution XPS spectra of BiFeO₃ and R40-BiFeO_3−x samples: (a) Bi 4f, (b) Fe 2p; O 1s high-resolution XPS spectra of BiFeO₃ (c), R20-BiFeO_3−x (d), R40-BiFeO_3−x (e), and R60-BiFeO_3−x (f).