CECU4AL AND CECU2ZN2AL - VERY-HEAVY-FERMION SYSTEMS IN HIGH MAGNETIC-FIELDS

被引:20
作者
ANDRAKA, B
KIM, JS
STEWART, GR
FISK, Z
机构
[1] UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545
[2] UNIV AUGSBURG,W-8900 AUGSBURG,GERMANY
来源
PHYSICAL REVIEW B | 1991年 / 44卷 / 09期
关键词
D O I
10.1103/PhysRevB.44.4371
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
CeCu4Al and CeCu2Zn2Al are heavy-fermion systems with extremely enhanced C/T (the specific heat divided by temperature) values of 2.3 and 1.8 J/K2, respectively, as T --> 0 K. The field dependence of the low-temperature specific heat is also extreme: At 11 T, C of CeCu4Al is reduced by more than a factor of 5 and at 12.5 T, C of CeCu2Zn2Al is suppressed by a factor of about 7. Magnetic-field-caused changes of the specific heat of CeCu4Al are consistent with a single-ion Kondo model. Magnetic correlations are at least partially responsible for the enhanced low-temperature specific heat of CeCu2Zn2Al.
引用
收藏
页码:4371 / 4373
页数:3
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