Neutron elastic and inelastic scattering was performed on a single crystal of the antiferromagnetic compound Cr2As. The temperature dependence of the Cr(I) sublattice magnetization has a peculiar form, compared with that of Cr(II). The spin-wave dispersion relation was obtained up to the zone boundary along the [0 0 1] axis and up to 12 meV along the [1 0 0] axis. The magnon energy gap is found to obey almost the same temperature dependence as that of the Cr(I) sublattice magnetization. These results suggest that an anisotropic exchange interaction plays an important role in the magnetic behavior of Cr2As.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering