  We present inelastic neutron scattering measurements and first principles
calculations examining the intermetallic marcasite CrSb2. The observed spin
wave dispersion implies that the magnetic interactions are strongly
one-dimensional with antiferromagnetic chains parallel to the crystalline
c-axis. Such low-dimensional excitations are unexpected in a semiconducting
intermetallic system. Moreover this material may be further interesting in that
the magnetic anisotropy may enhance thermoelectric properties along particular
crystallographic directions.
