Resolved the interlayer ferromagnetic ordering in the van der Waals layered material, Fe3-xGeTe2.
Significance and Impact
Interlayer magnetic ordering controls many physical properties such as topology, magnetoresistance, piezoelectricity, and second harmonic generation.
- Interlayer ordering is shown to be ferromagnetic based on neutron diffraction, scanning tunneling microscopy (STM), spin-polarized STM measurements, and density functional theory calculations.
- Fe3-xGeTe2 is a quasi 2D magnet with a relatively high transition temperature and a large anisotropy hosting intriguing properties, including skyrmionic bubbles and topological nodal lines.
X. Kong, G. D. Nguyen, J. Lee, C. Lee, S. Calder, A. F. May, Z. Gai, A.-P. Li, L. Liang, and T. Berlijn, "Interlayer Magnetism in Fe3-xGeTe2," Phys. Rev. Materials 4, 094403 (2020). DOI: 10.1103/PhysRevMaterials.4.094403