We have synthesized polycrystalline samples of CePtAl2 by arc melting method and examined their magnetic, transport and thermal properties by measuring the magnetization, the electrical resistivity, and the specific heat down to 0.4 K. As a result of these measurements, we found that CePtAl2 is a ferromagnetic Ce-based compound with the Curie-temperature Tc = 2.7 K.
Magnetic, transport, and thermal properties of new orthorhombic compounds Ce4Pt9Al13 and Ce4Pt9Al13 have been investigated by the magnetization, the electrical resistivity, and the specific-heat measurements. Ce4Pt9Al13 is a Kondo-lattice compound and shows a ferromagnetic or ferrimagnetic transition at T
C = 0.88 K. Pr4Pt9Al13 is an antiferromagnetic compound with the transition temperature at T
N = 2.6 K.
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