We study the electronic structure of the hexagonal DyCo5 and DyCo3B2 compou
nds. The magnetic moments and the band structures were calculated by ab ini
tio self-consistent tight binding linear muffin-tin orbital method within t
he atomic sphere approximation. These compounds crystallize in a hexagonal
structure having the P6/mmm space group. The substitution of cobalt by boro
n atoms changes the local environment of remaining Cc atoms and leads to th
e decrease in the local magnetic moments as well as in the Curie temperatur
e.