DHVA EFFECT OF CESB UNDER PRESSURE IN THE ANTIFERROMAGNETIC PHASE

We report the pressure dependence of the Fermi surfaces (FSs) of CeSb in an intermediate antiferromagnetic phase. The dHvA frequencies arisi ng from electron FSs increase monotonically with pressure. On the othe r hand, the frequency arising from a large hole surface increases, whi le those of small hole FSs decrease with pressure up to 2 kbar and the n increase with pressure. The results are discussed in the light of th e observations in the ferromagnetic phase and the p-f mixing model. (C ) 1998 Elsevier Science B.V. All rights reserved.