NEW FAMILIES OF LAYERED CUPRATES CONTAINING DOUBLE-MO2-UNIT FLUORITE BLOCKS - (HO, CE)3SR2CU3O11 AND (HO, CE)3SR2CU2(CU, PB)O11, (HO, CE)3SR2CU2(CU, FE)O11, (HO, CE)3SR2CU2(CU, AL)O11

被引：51

作者：

WADA, T

ICHINOSE, A

YAMAUCHI, H

TANAKA, S

机构：

[1] Superconductivity Research Laboratory, International Superconductivity Technology Center, Koto-ku, Tokyo, 135

来源：

PHYSICA C | 1990年 / 171卷 / 3-4期

关键词：

D O I：

10.1016/0921-4534(90)90151-4

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Two new families of layered cuprates, (Ho, Ce)3Sr2Cu2(Cu, Pb)O11 and (Ho, Ce)3Sr2Cu2(Cu, M)O11 (M = Cu, Fe, Al), have been synthesized. These compounds have tetragonal unit cells with the lattice constants, all being approximately equal to a = 3.8Å and c = 17 A ̊. A Rietveld analysis using X-ray powder diffraction data shows that the crystal structure of (Ho 1 3Ce 2 3)3Sr2Cu2 (Cu 1 2Pb 1 2)O11 consists of a new double-MO2-unit fluorite block, [(Ho, Ce)O2]2, and a Pb-based "1212" block, (Cu, Pb)Sr2(Ho, Ce)Cu2O7. The unit cell for (Ho, Ce)3Sr2Cu3O11 or (Ho, Ce)3Sr2Cu2(Cu, M)O11 (M = Fe or Al) is considered to consist of the double-MO2-unit fluorite block and an oxygen-deficient-triperovskite block, (Ho, Ce)Sr2(Cu, M)3O7 (M = Cu, Al or Fe). © 1990.

引用

页码：344 / 347

页数：4