STRUCTURAL FEATURES AND ELECTRICAL-PROPERTIES OF THE (LN1-X-Y,LN-'X,SRY)2CUO4-DELTA T-STAR-PHASE COMPOUNDS

被引：8

作者：

OHASHI, N ^{[1
]}

IKAWA, H ^{[1
]}

FUKUNAGA, O ^{[1
]}

TANAKA, J ^{[1
]}

机构：

[1] NATL INST RES INORGAN MAT,TSUKUBA,IBARAKI 305,JAPAN

来源：

PHYSICA C | 1990年 / 166卷 / 5-6期

关键词：

D O I：

10.1016/0921-4534(90)90045-G

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have prepared the (Nd0.660, Ce0.135, Sr0.205)2CuO4-δ-type (T*-phase) compounds in various A2CuO4-δ systems and discuss the average ionic radii (Rave) and the combination of "A" cation (Ln, Ln', Sr). The Rave value of the T*-phase is between 0.112 and 0.114 nm which is slightly smaller than the ionic radius of La3+ at an 8-coordinated site (0.116 nm). The characteristics of the superconductivity of the T*-phase are discussed, based on the cation combination of the T*-phase and the behavior of hole doping. The T*-phase of (Pr1-x-y,Lnx,Sry)2CuO4-δ composition could be doped to higher Sr concentration, but it shows little change in the semiconductive behavior by annealing under various oxygen annealing conditions. © 1990.

引用

页码：465 / 471

页数：7

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