MAGNETIC VERSUS NONMAGNETIC ION SUBSTITUTION EFFECTS ON TC IN THE LA-SR-CU-O AND ND-CE-CU-O SYSTEMS

被引：73

作者：

TARASCON, JM ^{[1
]}

WANG, E ^{[1
]}

KIVELSON, S ^{[1
]}

BAGLEY, BG ^{[1
]}

HULL, GW ^{[1
]}

RAMESH, R ^{[1
]}

机构：

[1] UNIV CALIF LOS ANGELES,DEPT PHYS,LOS ANGELES,CA 90024

来源：

PHYSICAL REVIEW B | 1990年 / 42卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.42.218

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of a substitution for Cu by other 3d metals (Ni, Co, and Zn) on Tc in the Nd-Ce-Cu-O system was studied and compared with effects of the same ions on Tc in the La-Sr-Cu-O system. We found (1) Zn suppresses Tc more slowly in the Nd than in the La systems, so the disorder produced by the nonmagnetic ions is less important in the Nd system, (2) Ni and Co depress Tc more quickly in the Nd than in the La system, showing that the magnetic pair breaking is stronger in the Nd system, and (3) in the La system the magnetism of the dopant has no effect on Tc. Thus, within the same chemical system (cuprates) we find that as the correlation length is increased one obtains more familiar BCS-type behavior. We suggest that much of the behavior of the various high-Tc oxides may be simply a function of the correlation length. © 1990 The American Physical Society.

引用

页码：218 / 222

页数：5

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