ION-SIZE EFFECT ON TC IN (R1-XPRX)BA2CU3O7-Y SYSTEMS (R=ND, EU, GD, DY, Y, ER, AND YB)

被引：134

作者：

XU, YH

GUAN, WY

机构：

[1] Institut fur Schicht und Ionentechnik der Forschungszentrum Julich, Gesellschaft Mit Beschrankter Haftung, D-5170 Julich

来源：

PHYSICAL REVIEW B | 1992年 / 45卷 / 06期

关键词：

D O I：

10.1103/PhysRevB.45.3176

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We observed that the superconducting-transition temperature (T(c)) of the oxides (R1-xPrx)Ba2Cu3-O7-y (R = Nd, Eu, Gd, Dy, Y, Er, and Yb) decreases monotonically with increasing Pr concentration x. At constant x, T(c) decreases approximately linearly with increasing radius of the R ions. We suggest that in (R1-xPrx)Ba2Cu3O7-y systems the hybridization between 4f states of the Pr ion and the conduction-band states is R-ion-radius dependent.

引用

页码：3176 / 3179

页数：4

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