Evolution of the electronic specific heat of (La{sub 1{minus}x}Ce{sub x}){sub 3}Al
- Instituto de Fisica `Gleb Wataghin`, Universidade Estadual de Campinas, Unicamp, 13083-970 Campinas, SP (Brazil)
The specific heat of (La{sub 1{minus}x}Ce{sub x}){sub 3}Al was measured in the temperature range from 2 to 30 K as function of the Ce concentration. The electronic specific heat for small x is close to the normal metal value (14 mJ/K{sup 2}mol f.u.), increasing to a maximum of 410 mJ/K{sup 2}mol Ce for x{approximately}0.4, characterizing a heavy-fermion behavior around this concentration. Above this critical concentration, the electronic specific heat decreases to 140 mJ/K{sup 2}mol Ce for x=1. From the fitting of the experimental data to Debye and Schottky type Kondo and crystal field contributions we estimated the Kondo temperature, {theta}{sub D}, {Delta}{sub 1}, and {Delta}{sub 2}. T{sub K} was found to increase with Ce concentration. Our results are interpreted in view of the competition between Kondo effect and Ruderman{endash}Kittel{endash}Kasuya{endash}Yosida interaction. {copyright} {ital 1997 American Institute of Physics.}
- OSTI ID:
- 496441
- Report Number(s):
- CONF-961141--
- Journal Information:
- Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 8 Vol. 81; ISSN JAPIAU; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
Similar Records
RKKY interaction between Ce ions in Ce{sub x}La{sub 1-x}B{sub 6}
Competing interactions in the heavy-electron antiferromagnets Ce M sub 2 Sn sub 2 ( M =Ni, Ir, Cu, Rh, Pd, and Pt)