LOW-TEMPERATURE MAGNETIZATION OF CE(RU0.85RH0.15)(2)SI-2

Magnetization measurements have been performed on a single-crystalline sample of Ce(Ru0.85Rh0.15)(2)Si-2 in magnetic fields along the tetrag onal c-axis up to 8 T in the temperature range between 40 mK and 10 K. Two transitions (B-C = 3.45 T, B-M = 5.5 T) are observed in the magne tization process at 40 mK. Further, at low temperatures, hysteresis is observed at B-C and this disappears above 2 K. Therefore, the transit ion at B-C is first order at low temperatures, but becomes second orde r above 2 K. (C) 1998 Elsevier Science B.V. All rights reserved.