A COMPARATIVE COMPOSITIONAL STUDY OF LN2-XMXCUO4-Y ELECTRON-DOPED SUPERCONDUCTORS

被引：28

作者：

AYOUB, NY

MARKERT, JT

EARLY, EA

SEAMAN, CL

PAULIUS, LM

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 C | 1990年 / 165卷 / 5-6期

关键词：

D O I：

10.1016/0921-4534(90)90383-P

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present the results of temperature-dependent magnetization and electrical resistivity measurements for a systematic series of compositions and concentrations of the electron-doped copper-oxide superconducting compounds Ln2-xMxCuO4-y (Ln = Pr, Nd, Sm, Eu; M = Ce, Th). The concentration dependences of normal and superconducting properties for both the Ce- and Th- doped systems are nearly identical, indicating that the Ce dopant ions exhibit simple tetravalent behavior. A number of distinct measures of superconducting properties display similar sharply-peaked concentration dependences; such variation is discussed in terms of phase homogeneity. © 1990.

引用

页码：469 / 474

页数：6

共 42 条

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[9] STRUCTURAL ANOMALIES IN ND2-XCEXCUO4-Y - EVIDENCE FOR MIXED-VALENCE AND CHARGE-TRANSFER [J].

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[10] DETERMINATION OF THE AVERAGE IONIC RADIUS AND EFFECTIVE VALENCE OF CE IN THE ND2-XCEXCUO4 ELECTRON SUPERCONDUCTOR SYSTEM BY X-RAY-DIFFRACTION [J].

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