Magnetic dilution of a honeycomb lattice XY magnet CoTiO.

We report our study of cobalt (II) titanate, CoTiO, in which magnetic Co ions are replaced by non-magnetic ions. The antiferromagnetic ordering transition of CoTiOaround 37 K is described with ferromagnetic honeycomb layers coupled antiferromagnetically along the crystallographic-direction. The effect of magnetic dilution on the Néel temperature of this material is investigated through the doping of Znand Mgin place of Cofor various dilution levels up to+= 0.