  The half metallic and magnetic properties of Zr2RhZ (Z = Al, Ga, In) alloys
with an Hg2CuTi-type structure were systematically investigated using the
first-principle calculations. Zr2RhZ (Z = Al, Ga, In) alloys are predicted to
be half-metallic ferrimagnets at their equilibrium lattice constants. The
Zr2Rh-based alloys have Mt (the total magnetic moment per unit cell) and Zt
(the valence concentration) values that in agreement with Slater-Pauling rule
Mt = Zt -18. The half-metallic properties and the magnetic properties at
different lattice constants are discussed in detail. We expect that our results
may trigger Zr2RhZ (Z = Al, Ga, In) applying in the future spintronics field.
