This title appears in the Scientific Report :
2020
Please use the identifier:
http://dx.doi.org/10.1103/PhysRevResearch.2.023406 in citations.
Please use the identifier: http://hdl.handle.net/2128/25343 in citations.
Observation of iron diffusion in the near-surface region of magnetite at 470 K
Observation of iron diffusion in the near-surface region of magnetite at 470 K
Experiments are reported, which allow us to quantify the near-surface cation diffusion in (001) oriented Fe$_3$O$_4$ single crystals at temperatures between 470 and 770 K. Thin homoepitaxial films of magnetite, grown using isotopically labeled $^{57}$Fe, were investigated by neutron reflectivity and...
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Personal Name(s): | Tober, Steffen (First author) |
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Creutzburg, Marcus / Arndt, Björn / Krausert, Konstantin / Mattauch, Stefan / Koutsioubas, Alexandros / Pütter, Sabine / Mohd, Amir Syed / Volgger, Lukas / Hutter, Herbert / Noei, Heshmat / Vonk, Vedran / Lott, Dieter / Stierle, Andreas (Corresponding author) | |
Contributing Institute: |
Heinz Maier-Leibnitz Zentrum; MLZ Streumethoden; JCNS-2 JCNS-FRM-II; JCNS-FRM-II |
Published in: | Physical review research, 2 (2020) 2, S. 023406 |
Imprint: |
College Park, MD
APS
2020
|
DOI: |
10.1103/PhysRevResearch.2.023406 |
Document Type: |
Journal Article |
Research Program: |
FRM II / MLZ Quantum Condensed Matter: Magnetism, Superconductivity Jülich Centre for Neutron Research (JCNS) Controlling Collective States |
Subject (ZB): | |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/25343 in citations.
Experiments are reported, which allow us to quantify the near-surface cation diffusion in (001) oriented Fe$_3$O$_4$ single crystals at temperatures between 470 and 770 K. Thin homoepitaxial films of magnetite, grown using isotopically labeled $^{57}$Fe, were investigated by neutron reflectivity and time-of-flight secondary ion mass spectrometry. By heating the thin films in high vacuum to different temperatures for a well-defined time and determining the ${57}$ Fe distribution along the surface normal, the diffusion lengths are obtained. For the investigated temperature range, diffusion constants of the order of 10$^{−20}$ m$^2$/s are deduced. These results are important in view of near-surface mass transport induced by oxygen chemical potential differences occurring when magnetite is exposed to different gas atmospheres or by adsorbates. |