Abstract
A series of CePt 3X intermetallics ( X = Si , Al, Ge, B) has been synthesized, characterized by X-ray powder diffraction and microprobe analysis. CePt 3Si and CePt 3B compounds crystallize in a non-centrosymmetric CePt 3B-type structure with a space group P 4 mm, while the diffraction patterns of CePt 3Al and CePt 3Ge show pronounced splitting of diffraction lines indicating a disordered CePt 3B-type structure or rather a new crystallographic structure with a lower symmetry. The results of specific heat and electrical resistivity measurements are discussed. While the heavy fermion superconductivity coexists with the long-range antiferromagnetic ordering in CePt 3Si, the other compounds show a rather complex magnetic ordering at low temperatures; however, no sign of superconductivity has been observed down to 0.4 K.
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