Structure of X-Ray Photoelectron Spectra of Magnetite

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发表日期：

2024年6月1日

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K. I. Maslakov,
Yu. A. Teterin,
A. V. Safonov,
V. G. Yarzhemsky,
A. Yu. Teterin,
G. D. Artem’ev,
I. I. Zin’kovskaya

摘要

Abstract—

We have studied the complex structure of valence-band and core-level X-ray photoelectron spectroscopy (XPS) spectra of a geological magnetite sample (Fe₃O₄, Sverdlovsk oblast, Russia) containing Fe²⁺ and Fe³⁺ ions and impurities (Mg, Al, Si, Ti, and others). The results demonstrate that the XPS spectra of magnetite reflect a superposition of spectra of Fe²⁺ (3d⁶) and Fe³⁺ (3d⁵) ions in their high-spin states. We have evaluated the Fe 3p, Fe 3s, and Fe 2p binding energies in the different Fe ions. The measured Fe 3s spectrum of magnetite consists of two doublets with a splitting of 5.2 eV for Fe²⁺ and 6.5 eV for Fe³⁺. These values agree with results of theoretical calculations for Fe atoms by the final state configurational interaction method: 4.0 eV for Fe²⁺ (3d⁶) and 6.8 eV for Fe³⁺ (3d⁵).