TH-DOPED URU2SI2 - INFLUENCE OF KONDO HOLES ON COEXISTING SUPERCONDUCTIVITY AND MAGNETISM

被引：29

作者：

DELATORRE, AL

VISANI, P

DALICHAOUCH, Y

LEE, BW

MAPLE, MB

机构：

[1] UNIV CALIF SAN DIEGO,DEPT PHYS,LA JOLLA,CA 92093

[2] UNIV CALIF SAN DIEGO,INST PURE & APPL PHYS SCI,LA JOLLA,CA 92093

来源：

PHYSICA B | 1992年 / 179卷 / 03期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0921-4526(92)90018-N

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The effect of thorium impurities on superconductivity and antiferromagnetism, which coexist below the superconducting critical temperature T(c). has been investigated in the heavy electron compound URu2Si2. The substitution of up to 5 at % Th for U was found to (1) enhance the low temperature normal state magnetic susceptibility and electronic specific heat coefficient-gamma, (2) broaden the superconducting and antiferromagnetic transitions, (3) suppress the specific heat jump associated with the superconductivitv at T(c) and antiferromagnetism at the Neel temperature T(N), and (4) induce a Kondo-like minimum in the electrical resistivity at low temperatures. The increase in gamma and decrease in T(N) and the antiferromagnetic energy gap-DELTA with negative "chemical pressure" associated with the substitution of Th for U correlates with the decrease in gamma and increase in T(N) and DELTA upon application of an external pressure.

引用

页码：208 / 214

页数：7

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