PB2SR2LNCECU3O10+DELTA, A NEW MEMBER OF THE LAYERED CUPRATES FAMILY, BUILT UP FROM DOUBLE FLUORITE-TYPE LAYERS

被引：36

作者：

ROUILLON, T

GROULT, D

HERVIEU, M

MICHEL, C

RAVEAU, B

机构：

[1] Laboratoire CRISMAT, Université de Caen, 14032 CAEN cedex, ISMRa campus 2, Boulevard Marechal Juin

来源：

PHYSICA C | 1990年 / 167卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(90)90493-X

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A new member of the layered cuprates, Pb2Sr2LnCeCu3O10+δ(Ln = Pr, Nd, Sm, La) has been isolated. It crystallizes in the space group Fmmm with a = 5.442 (4) Å, b = 5.462 (4) Å, c = 36.90 (2) Å but a weak superstructure is observed by electron diffraction. Its structure consists of a triple intergrowth of single rock salt layers, double fluorite-type layers and oxygen deficient perovskite layers. In fact such a framework can be deduced from that of Pb2Sr2Y0.5Ca0.5Cu3O8 by replacing the single fluorite "yttrium" layers by double fluorite-type layers. The disproportionation of copper in that phase and the absence of superconductivity are discussed. © 1990.

引用

页码：107 / 111

页数：5

共 8 条

[1] SUPERCONDUCTIVITY NEAR 70-K IN A NEW FAMILY OF LAYERED COPPER OXIDES [J].