Abstract
We have systematically studied the magnetic properties of the Kondo lattice system CeNi 1-xCo xGe 2 by using magnetic-susceptibility experiments. With increasing x, 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 2.55μ 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.
| Original language | English |
|---|---|
| Pages (from-to) | 479-483 |
| Number of pages | 5 |
| Journal | Journal of the Korean Physical Society |
| Volume | 47 |
| Issue number | 3 |
| State | Published - Sep 2005 |
Keywords
- CeNi Co Ge
- Heavy fermion
- Kondo effect
- Magnetic property
- Non-fermi-liquid behavior