Conference Presentation (Invited)

FZJ-2023-02175

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Magnetite (Fe3−𝛿O4) homoepitaxy observed by X-ray intensity growth oscillations

Tober, S.FZJ* ; Creutzburg, M. ; Arndt, B. ; Chung, S. ; Jacobse, L. ; Jeromin, A. ; Vonk, V. ; Stierle, A.

2023

Please use a persistent id in citations: http://hdl.handle.net/2128/34470

Abstract: Processes on the Fe3−𝛿O4 (001) surface like oxidative regrowth, (partial)lifting of the subsurface cation vacancy reconstruction and theelement-specific incorporation of adatoms demonstrate the sensitiverelation of oxygen pressure, cation transport and structure in the nearsurfaceregion of Fe3−𝛿O4 influencing the performance of catalysts anddevices [1,2,3]. We exemplarily studied the homoepitaxial growth ofFe3−𝛿O4 (001) in dependence of the O2 pressure and iron flux. Xrayintensity growth oscillations proved ordered growth of Fe3−𝛿O4for all probed conditions while atomic force microscopy revealed newlyformed micrometre-sized surface structures exceeding the amount ofdeposited material [4]. Our results indicate the presence of multipleparallel processes during reactive Fe3−𝛿O4 homoepitaxy suggestingsimilar processes to occur also in other applications of Fe3−𝛿O4.[1] Nie et al., J. Am. Chem. Soc. 135, 10091 (2013), [2] Arndt, B. etal. PCCP 22, 8336 (2020), [3] Mirabella et al., Electrochimica Acta,389, 138638 (2021), [4] van der Vegt et al., Phys. Rev. Lett. 68, 3335(1992)

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Contributing Institute(s):

1. Streumethoden (JCNS-2)
2. Streumethoden (PGI-4)
3. JARA-FIT (JARA-FIT)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)
2. 6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ) (POF4-6G4) (POF4-6G4)

Appears in the scientific report 2023

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Database coverage:

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