Electronic, magnetic, and thermodynamic properties of the kagome layer compound FeSn
Journal Article
·
· Physical Review Materials
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
Single crystals of the single Kagome layer compound FeSn are investigated using xray and neutron scattering, magnetic susceptibility and magnetization, heat capacity, resistivity, Hall, Seebeck, thermal expansion, thermal conductivity measurements and density functional theory (DFT). FeSn is a planar antiferromagnet below TN = 365 K and exhibits ferromagnetic magnetic order within each Kagome layer. The in-plane magnetic susceptibility is sensitive to synthesis conditions. Resistivity, Hall and Seebeck results indicate multiple bands near the Fermi energy. The resistivity of FeSn is ≈ 3 times lower for current along the stacking direction than in the plane, suggesting that transport and the bulk electronic structure of FeSn is not quasi 2D. FeSn is an excellent metal with ρ(300K)/ρ(2K) values ≈100 in both directions. While the ordered state is antiferromagnetic, high temperature susceptibility measurements indicate a ferromagnetic Curie-Weiss temperature of 173 K, reflecting the strong in-plane ferromagnetic interactions. DFT calculations show a 3D electronic structure with the Dirac nodal lines along the K-H directions in the magnetic Brillouin zone about 0.3 eV below the Fermi energy, with the Dirac dispersions at the K points gapped by spin-orbit coupling except at the H point. The magnetism, however, is highly 2D with Jin-plane/Jout-of-plane ≈ 10. In conclusion, the predicted spin-wave spectrum is presented.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 3002975
- Alternate ID(s):
- OSTI ID: 1785628
- Journal Information:
- Physical Review Materials, Journal Name: Physical Review Materials Journal Issue: 11 Vol. 3; ISSN 2475-9953
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
High quality epitaxial thin films and exchange bias of antiferromagnetic Dirac semimetal FeSn
Spin excitations in metallic kagome lattice FeSn and CoSn
Journal Article
·
Tue Jul 21 20:00:00 EDT 2020
· Applied Physics Letters
·
OSTI ID:1656588
Spin excitations in metallic kagome lattice FeSn and CoSn
Journal Article
·
Wed Nov 10 19:00:00 EST 2021
· Communications Physics
·
OSTI ID:1997818