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Magnetically Ordered Transition-Metal-Intercalated WSe2.
Pankaj Kumar1, Ralph Skomski2, Raghani Pushpa1
1Department of Physics, Boise State University, 1910 University Dr., Boise, Idaho 83725, United States.
ACS Omega
|August 29, 2019
Summary
Introducing magnetic properties into nonmagnetic tungsten diselenide (WSe2) is key for spintronic devices. Transition-metal intercalation creates substantial magnetic moments and ferromagnetic order, enabling potential applications in nanomagnetic technologies.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Nonmagnetic transition metal dichalcogenides lack intrinsic magnetic properties.
- Developing magnetic behavior in these materials is crucial for advanced spintronic and nanomagnetic devices.
Purpose of the Study:
- Investigate the electronic and magnetic properties of transition-metal-intercalated tungsten diselenide (WSe2).
- Explore the potential of these intercalated compounds for spintronic and nanomagnetic applications.
Main Methods:
- Density functional theory calculations were employed to study T1/4WSe2 (T = transition metal).
- Analysis of electronic densities of states and magnetic moments on W sites.
Main Results:
- Intercalation with late transition metals (Cr, Mn, Fe) induces significant magnetic moments and ferromagnetic order.
- Fe1/4WSe2 exhibits large perpendicular magnetocrystalline anisotropy (~9 meV/supercell).
- High Curie temperatures were predicted (e.g., 660 K for Cr, 475 K for Mn, 379 K for Fe) using mean-field theory.
Conclusions:
- Transition-metal intercalation effectively introduces magnetism into WSe2.
- These magnetic WSe2 compounds show promise for future spintronic and nanomagnetic device applications.
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