FORMATION OF A HEAVY FERMION PHASE IN UCU4+XAL8-X BY VARIATION OF STOICHIOMETRY

被引：29

作者：

GEIBEL, C ^{[1
]}

AHLHEIM, U ^{[1
]}

GIORGI, AL ^{[1
]}

SPARN, G ^{[1
]}

SPILLE, H ^{[1
]}

STEGLICH, F ^{[1
]}

SUSKI, W ^{[1
]}

机构：

[1] POLISH ACAD SCI,INST LOW TEMP & STRUCT RES,PL-50950 WROCLAW 2,POLAND

来源：

PHYSICA B | 1990年 / 163卷 / 1-3期

关键词：

D O I：

10.1016/0921-4526(90)90166-R

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Progressive substitution of Cu for Al in UCu4+xAl8-x yields as increasing compression of the unit cell. This results in a reduction of the Néel temperature from ifTN = 42 K for x = 0 to ifTN = 15 K for x = 1.0. No magnetic ordering is found for x ≥ 1.5. Rather the T-dependence of the resistivity shows a maximum in the range 6 to 15 K and indicates the formation of a Kondo-lattice state. The latter is characterized by heavy fermions (γ(Tå0)≅0.8 J/K2 mol for x = 1.75). © 1990.

引用

页码：194 / 196

页数：3

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