Magnetic and electrical properties of the UCu4-xMnxAl8 alloys

The UCu4-xMnxAl8 system exists in a single-phase form for the whole concent ration range. The magnetic and electrical properties hal e been examined in the temperature ranges 1.7-300 K and 4.2-300 K, respectively. The lattice parameters increase with increasing x, however with da/dx>dc/dx. The magnet ic susceptibility follows the modified Curie-Weiss law at T>20 K. The incre ase of the Mn concentration, L is reflected in a higher value of the temper ature independent part of the susceptibility which can be related to the in crease of the Pauli-like susceptibility of the band electrons. The electric al resistivity is typical for metallic compounds bur for lower x then are a nomalies in rho (T) plots corresponding roughly to the Neel point of UCu4Al 8 (C) 2001 Elsevier Science B.V. All rights reserved.