Magnetic behavior of CePdAl under high pressures and high magnetic fields

The magnetization of CePdAl was measured at low temperatures on a single cr ystal in steady fields up to 10 T and on powdered sample in pulsed fields u p to 43 T. Three magnetization steps were found which may be caused by geom etrical frustration effects. No transition was observed above 7 T. The magn etization amounts to 1.05 mu(B)/Ce at 43 T. According to the susceptibility measurement under high pressure, the susceptibility and the Neel temperatu re (T-N) decrease by pressure, and the antiferromagnetic order disappears a bove 1.1 GPa. It suggests the quantum phase transition occurs at 1.1 GPa. ( C) 2000 Elsevier Science B.V. All rights reserved.