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Emergent magnetism at transition-metal-nanocarbon interfaces
Fatma Al Ma'Mari1,2, Matthew Rogers1, Shoug Alghamdi1
1School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, United Kingdom.
Charge transfer at metal-carbon interfaces creates emergent magnetism in new hybrid materials. This eco-friendly approach offers tunable magnetic properties for advanced electronic devices.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Metallo-molecular interfaces offer potential for novel magnetic materials.
- Charge transfer is key to emergent magnetism in hybrid systems.
Purpose of the Study:
- Investigate the origin of magnetism at metal-carbon interfaces.
- Explore the role of carbon hybridization in magnetic properties.
Main Methods:
- Probed 3d and 5d metal films (Sc, Mn, Cu, Pt) with fullerenes and carbon layers.
- Utilized low-energy muon spin spectroscopy and X-ray magnetic circular dichroism (XMCD).
Main Results:
- Observed emergent magnetism with high Curie points and tunable properties.
- Identified spin polarization in carbon's molecular orbitals via charge transfer and hybridization.
- Demonstrated increased magnetization with sp3 to sp2 carbon hybridization.
Conclusions:
- Charge transfer and metal-carbon hybridization drive emergent magnetism.
- Thin-film carbon-based magnets enable electrooptical spin manipulation.
- Potential applications in computing, sensors, and multifunctional magnetic devices.
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