Magnetic properties and specific heat of R2Ni2In (R=Gd-Tm) compounds

The R2Ni2In (R=Gd-Tm) compounds were investigated by means of X-ray diffraction, magnetic and specific heat measurements. The compounds crystallize in the orthorhombic Mn2AlB2-type crystal structure. A low temperature ground state is antiferromagnetic. Critical temperature of magnetic ordering does not fulfill the de Gennes scaling which points to the influence of crystal electric field on stabilization of magnetic order.