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Asymmetric alloy formation at the Fe-on-Ti and Ti-on-Fe interfaces
J Balogh1, P Süle2, L Bujdosó1
1Wigner Research Centre for Physics, Hungarian Academy of Sciences, H-1525 Budapest 114, PO Box 49, Hungary.
Journal of Physics. Condensed Matter : an Institute of Physics Journal
|September 29, 2018
Summary
This study investigated titanium-iron interfaces in trilayers using advanced microscopy and spectroscopy. Results reveal asymmetric interface structures, with sharper transitions at Ti-on-Fe compared to Fe-on-Ti interfaces.
Area of Science:
- Materials Science
- Surface Science
- Nanotechnology
Background:
- Understanding nanoscale interfaces is crucial for designing advanced materials.
- Titanium-iron interfaces are relevant in various technological applications.
- Previous studies have explored these interfaces with limited resolution.
Purpose of the Study:
- To experimentally characterize the nanoscale structure and composition of Fe-on-Ti and Ti-on-Fe interfaces.
- To compare experimental findings with molecular dynamics simulations.
- To investigate the asymmetry and interface widths in Ti/Fe/Ti trilayers.
Main Methods:
- Mössbauer spectroscopy (MS) for phase identification and layer fractions.
- Transmission electron microscopy (TEM) for nanoscale structure and composition.
- X-ray reflectometry (XRR) for layer structure and interface widths.
- Molecular dynamics (MD) simulations for growth behavior and concentration distributions.
Main Results:
- MD simulations predicted asymmetric concentration distributions at the interfaces.
- Experimentally observed sharper Ti-on-Fe interfaces for specific Fe underlayer orientations.
- Fe-on-Ti interfaces showed broader transitions across studied Ti underlayer orientations.
- MS and XRR confirmed interface asymmetry but indicated larger experimental widths than simulations.
Conclusions:
- The study confirms asymmetry between the top and bottom Fe interfaces in Ti/Fe/Ti trilayers.
- Discrepancies between experimental and simulated interface widths highlight areas for further research.
- The findings provide insights into the atomic-scale growth and structure of metallic multilayers.
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