A NEW TYPE OF HOMOLOGOUS SERIES IN THE LA-CU-O SYSTEM

被引：35

作者：

CAVA, RJ ^{[1
]}

SIEGRIST, T ^{[1
]}

HESSEN, B ^{[1
]}

KRAJEWSKI, JJ ^{[1
]}

PECK, WF ^{[1
]}

BATLOGG, B ^{[1
]}

TAKAGI, H ^{[1
]}

WASZCZAK, JV ^{[1
]}

SCHNEEMEYER, LF ^{[1
]}

ZANDBERGEN, HW ^{[1
]}

机构：

[1] DELFT UNIV TECHNOL,NATL CTR HIGH RESOLUT ELECTRON MICROSCOPY,DELFT,NETHERLANDS

来源：

PHYSICA C | 1991年 / 177卷 / 1-3期

关键词：

D O I：

10.1016/0921-4534(91)90306-J

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The synthesis and structural characterization of a new type of homologous series of lanthanum cuprates, with the general formula La4+4nCu8+2nO14+8n, is reported. The n = 2 and n = 3 members, La2Cu2O5 and La8Cu7O19, synthesized in bulk, are stable over very narrow temperature ranges in air and oxygen. Higher members (n > 3) have been observed by electron microscopy. The crystal structure of La2Cu2O5 consists of thin slabs of La2CuO4 sandwiched between CuO planes of complex low-dimensional geometry. The temperature dependent magnetic susceptibilities of La2Cu2O5 and La8Cu7O19 are characteristic of low-dimensional Heisenberg antiferromagnets with a remarkably low exchange coupling energy.

引用

页码：115 / 121

页数：7

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