Fermi surface properties of CeIn3 around the critical pressure

Abstract

We have studied a change of the Fermi surface in an antiferromagnet CeIn3 via the de Haasvan Alphen experiment under pressure up to 2.9 GPa. In the pressure region P > Pc = 2.6 GPa, we have observed a large main Fermi surface named a, which indicates that the electronic state of 4f electron in CeIn3 changes from localized to itinerant at P c. The cyclotron effective mass m*c of this main Fermi surface is extremely enhanced around Pc. © 2006 The Physical Society of Japan.