Electronic, magnetic and thermodynamic properties of the Kagome layer metal FeSn

FeSn is an itinerant antiferromagnet composed of metallic Kagome layers. FeSn single crystals are investigated using x-ray and neutron scattering, magnetic susceptibility and magnetization, heat capacity, resistivity, Hall, Seebeck, thermal expansion, thermal conductivity measurements and density functional theory. In spite of the quasi 2D Kagome layers with Dirac nodal lines along the K-H directions in the magnetic Brillouin zone about 0.3 eV below the Fermi energy, the measured properties strongly suggest that the overall electronic structure is 3D. The magnetism, however, is predicted to be highly 2D with Jin-plane/Jout-of-plane ≈ 10. The impact of Dirac nodes on the physics on this material will be discussed.