RUTHENIUM-BASED LAYERED CUPRATES RUSR(2)LNCU(2)O(8) AND RUSR2(LN(1+X) CE-1-X) CU2O10 (LN=SM, EU AND GD)

被引：422

作者：

BAUERNFEIND, L

WIDDER, W

BRAUN, HF

机构：

[1] Physikalisches Institut, Universität Bayreuth

来源：

PHYSICA C | 1995年 / 254卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(95)00574-9

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We synthesized layered cuprates where the intermediate layer between the CuO2 blocks consists of vertex sharing RuO6 octahedra. The (idealized) stoichiometries of these compounds are RuSr(2)LnCu(2)O(8) (Ru-1212) and RuSr2(Ln(1+x)Ce(1-x)) Cu2O10 (Ru-1222), where Ln is one of the three neighboring lanthanides Sm, Eu and Gd. The analogy to the isostructural Nb based compounds, as well as simple valence counting, suggest that Ru is pentavalent in these compounds. Both 1212 and 1222 compounds are semiconducting when prepared in air and rapidly cooled to room temperature. Metallic behavior and superconductivity can be achieved for various compositions upon appropriate annealing.

引用

页码：151 / 158

页数：8

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