Cu-NQR study of magnetism and superconductivity in Ce1+xCu2+ySi2 under pressure

被引：6

作者：

Kawasaki, Y ^{[1
]}

Ishida, K

Mito, T

Thessieu, C

Zheng, GQ

Kitaoka, Y

Asayama, K

Geibel, C

Steglich, F

机构：

[1] Osaka Univ, Grad Sch Engn Sci, Dept Phys Sci, Toyonaka, Osaka 5608531, Japan

[2] Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany

来源：

PHYSICA B | 2000年 / 281卷

关键词：

CeCu2Si2; NQR; pressure;

D O I：

10.1016/S0921-4526(99)01172-2

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

In order to investigate the magnetic properties at the vicinity of magnetic to superconducting (SC) phase boundary, we have performed Cu-NQR measurements under hydrostatic pressure (P) on two off-stoichiometric CC1+xCU2+ySi2 Ce(0.99)Cn(2.02)Si(2) exhibits the anomalous ground state so-called A-phase, dominated by critical magnetic correlations and affected by a presence of minor SC fraction at ambient P. With increasing P which enhances the Kondo temperature the fraction of the A-phase is markedly suppressed, but the SC fraction is increased, although T-c stays nearly constant in the range of 1 bar <P<14.4 kbar. This evidences that the P-induced A- to SC phase change is of first order. In Ce0.975Cu2Si2 which undergoes a static magnetic ordering (SMO) at ambient P below T-N similar to 0.6 K, no superconductivity has been induced up to 19.4 kbar. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：14 / 15

页数：2

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