Magnetic properties of various Kondo ground states in the heavy-fermion system CeNi1-xCoxGe2

被引：0

作者：

Hong, JB

Park, T

Kwon, YS ^{[1
]}

机构：

[1] Sungkyunkwan Univ, BK21 Phys Res Div, Suwon 440746, South Korea

[2] Sungkyunkwan Univ, Inst Basic Sci, Suwon 440746, South Korea

[3] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[4] Seoul Natl Univ, Ctr Strongly Correlated Mat Res, Seoul 151742, South Korea

来源：

JOURNAL OF THE KOREAN PHYSICAL SOCIETY | 2005年 / 47卷 / 03期

关键词：

heavy fermion; Kondo effect; non-fermi-liquid behavior; magnetic property; CeNi1-xCoxGe2;

D O I：

暂无

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have systematically studied the magnetic properties of the Kondo lattice system CeNi1-xCoxGe2 by using magnetic-susceptibility experiments. With increasing chi, hybridization between the localized 4f and the conduction-band electrons is enhanced. The magnetic order observed for the x = 0 composition is suppressed below 2 K for x >= 0.1. At high temperatures, the inverse magnetic susceptibilities for all x values are well fitted by a Curie-Weiss law with an effective magnetic moment of 2.55 mu(B). Anomalies found in the low-temperature region of the magnetic susceptibility are well explained by the Kondo model for a degenerate impurity spin J = 1/2, 3/2 and 5/2 in the Coqblin-Schrieffer limit for the Co concentration ranges of x <= 0.6, 0.7 <= x <= 0.8, and x >= 0.9, respectively.

引用

页码：479 / 483

页数：5

共 20 条

[1] SCALES AND SCALING IN THE KONDO MODEL [J].