Possible mixed valence behavior of CeIr2Ga and YbIr2Ga

Abstract We report possible mixed valence behavior in the new ternary compounds CeIr 2 Ga and YbIr 2 Ga. These materials crystallize in the hexagonal Na 3 As structure of space group P6 3 cm. Magnetization, specific heat and transport measurements show reduced magnetic moments and the absence of magnetic order above 0.04 K. The quasi-2D structure of these compounds offers the possibility for investigating the role of spatial dimensionality on mixed valence phenomena.