Synthesis, structure, and magnetism of Tb4PdGa12 and Tb4PtGa12

Abstract Single crystals of Tb 4 M Ga 12 ( M =Pd, Pt) have been synthesized. The isostructural compounds crystallize in the cubic space group Im 3 ¯ m , with Z = 2 and lattice parameters: a =8.5940(5) and 8.5850(3) A for Tb 4 PdGa 12 and Tb 4 PtGa 12 , respectively. The crystal structure consists of corner-sharing M Ga 6 octahedra and TbGa 3 cuboctahedra. Magnetic measurements suggest that Tb 4 PdGa 12 is an antiferromagnetic metamagnet with a Neel temperature of 16 K, while the Pt analog orders at T N = 12  K.