Abstract
This work investigates the effects of further neighbor exchange and cubic anisotropy on the magnetic excitations of the fcc kagome antiferromagnet . Spin wave frequencies are calculated using the torque equation and the dynamical structure factor is determined by a Green's function method as an extension of our previous work. These spin wave calculations are compared with inelastic neutron scattering data of polycrystalline , where magnetic Mn ions occupy lattice sites of ABC-stacked kagome planes. The data are best explained by a spin wave model including exchange interactions up to fourth nearest neighbor and strong cubic anisotropy, as previously predicted by density functional theory calculations.
| Original language | English |
|---|---|
| Article number | 014427 |
| Journal | Physical Review B |
| Volume | 104 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jul 1 2021 |
Funding
This work was supported by the Natural Sciences and Engineering Council (NSERC) of Canada, the Canada Foundation for Innovation (CFI), and Compute Canada. Materials synthesis by JQY was supported by the US Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division. A portion of this research used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by Oak Ridge National Laboratory (ORNL). The Monte Carlo ray tracing simulations were performed on the CADES cloud computing resource at ORNL. Natural Sciences and Engineering Research Council of Canada Canada Foundation for Innovation Compute Canada U.S. Department of Energy Oak Ridge National Laboratory