| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Magnetism and Magnetic Materials
|
| Presentation Title |
Magnetic Iron Disilicide Nanostructures: Computational Studies |
| Author(s) |
Matthew Sisson, Alyssa Horne, Liwei D. Geng, Sahil Dhoka, Ranjit Pati, Yongmei M. Jin |
| On-Site Speaker (Planned) |
Yongmei M. Jin |
| Abstract Scope |
Iron-silicon systems exhibit a wide range of electronic and magnetic properties, making them important materials for silicon-based device applications. Recent experiments have revealed that nominally non-magnetic iron disilicide can acquire magnetism when synthesized into epitaxial nanoislands on silicon substrate, with their magnetic properties being modifiable by varying nanoisland geometries. To investigate this phenomenon, we employed first-principles density functional theory (DFT) and micromagnetic simulations to study magnetism in iron disilicide nanostructures. Our DFT calculations on gamma-FeSi2/Si(111) nanostructures show that the epitaxial strain, free surfaces, and interfaces do not contribute to magnetism, whereas edges exhibit magnetism depending on their orientation. Accordingly, we examined gamma-FeSi2 nanoislands with ferromagnetic edges using micromagnetic simulations. The calculated hysteresis curves and coercivity are discussed in terms of edge morphology and island geometry. These findings provide insights into the magnetism of iron disilicide nanoislands. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnetic Materials, Modeling and Simulation, Computational Materials Science & Engineering |