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Multiplet XPS analysis of the Mn 2pfor Mn3O4thin films
Jade Barreto1, Paul S Bagus2, Fernando Stavale1
1Brazilian Center for Research in Physics, 22290-180, Rio de Janeiro, RJ, Brazil.
Summary
This study analyzes X-ray photoemission spectroscopy (XPS) of manganese oxide (Mn3O4) thin films. Detailed analysis reveals the relative concentrations of Mn2+ and Mn3+ cations, crucial for understanding oxide structure.
Area of Science:
- Materials Science
- Surface Science
- Solid State Chemistry
Background:
- Manganese oxide (Mn3O4) thin films present complex X-ray photoemission spectroscopy (XPS) spectra due to multiple cation states (Mn2+, Mn3+) and multiplet structures.
- Understanding the cation distribution in Mn3O4 is vital for its applications, but spectral complexity poses significant analytical challenges.
Purpose of the Study:
- To perform a detailed analysis of the Mn 2p XPS peak for Mn3O4(001) thin films.
- To elucidate the contributions of Mn2+ and Mn3+ cations to the XPS spectra and determine their relative concentrations.
Main Methods:
- Experimental preparation of Mn3O4 thin films on Au(111).
- Structural characterization using low-energy electron diffraction (LEED).
- Analysis of Mn 2p XPS spectra, guided by cluster model theoretical predictions.
Main Results:
- Successfully resolved and analyzed the complex multiplet structures in the Mn 2p XPS spectra.
- Determined the relative concentrations of Mn2+ and Mn3+ cations within the Mn3O4 films.
- Demonstrated the influence of oxygen partial pressure on cation distribution.
Conclusions:
- Detailed XPS analysis, supported by theoretical models, is feasible for complex oxides like Mn3O4.
- The study provides a method to quantify cation distribution, essential for tailoring material properties.
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