Quantum critical behavior in a CePt ferromagnetic Kondo lattice

被引：44

作者：

Larrea, J

Fontes, MB

Alvarenga, AD

Baggio-Saitovitch, EM

Burghardt, T

Eichler, A

Continentino, MA

机构：

[1] Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil

[2] Tech Univ Braunschweig, Inst Angew Phys, D-38106 Braunschweig, Germany

[3] Univ Fed Fluminense, Inst Fis, BR-24210340 Niteroi, RJ, Brazil

来源：

PHYSICAL REVIEW B | 2005年 / 72卷 / 03期

关键词：

D O I：

10.1103/PhysRevB.72.035129

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Most of the studies of heavy fermions near a quantum critical point (QCP) have been carried out on antiferromagnetic systems. In this paper we report on the disappearance of ferromagnetic (FM) order in CePt as seen by the ac magnetic susceptibility and the electrical resistance measurements under pressures P up to 15 GPa. The pressure dependence of the Curie temperature T-C(P) follows a typical Doniach's phase diagram for Kondo lattice systems and it is consistent with a QCP at the critical pressure P-C approximate to 12.1 GPa. The resistance in the vicinity of the QCP shows clearly a non-Fermi liquid (NFL) and beyond that a Fermi liquid (FL) state is recovered. A semiquantitative discussion on the nature of the vanishing of T-C in a FM Ce Kondo lattice is given for the first time.

引用

页数：6

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