THERMAL, MAGNETIC AND TRANSPORT-PROPERTIES OF PARAMAGNETIC REAUGE COMPOUNDS (RE=SC,Y,LA,LU)

Magnetic susceptibility, electrical resistivity (1.5-300 Ii), and spec ific heat capacity (1.7-50 Ii) were measured on REAuGe (RE = Sc,Y,La,L u). The hexagonal c-lattice constant increases with the RE-ion size. T his leads to a strong variation in tile phononic system as analysed fr om the specific heat data by a Debye model ansatz. The electronic prop erties of the Y, La, Lu-compounds (Pauli susceptibility, Sommerfeld co efficent) are correlated by a constant Wilson ratio chi(Pauli)/gamma. While ScAuGe and LuAuGe show typical metallic resistivities, YAuGe and especially LaAuGe display much higher resistivities (approximate to 8 00 mu Omega cm) which saturate at high temperatures.