Abstract
We present inelastic neutron scattering measurements and first principles calculations examining the intermetallic marcasite . The observed spin-wave dispersion implies that the magnetic interactions are strongly one-dimensional with antiferromagnetic chains parallel to the crystalline axis. Such low-dimensional excitations are unexpected in a semiconducting intermetallic system. Moreover, we observe a clear anisotropic thermal conductivity indicating that the magnetic anisotropy enhances thermoelectric properties along particular crystallographic directions.
- Received 11 November 2011
DOI:https://doi.org/10.1103/PhysRevLett.108.167202
© 2012 American Physical Society