TLBA2-XLA2+XCU2O9+/-DELTA - A NEW 42-K SUPERCONDUCTOR, INTERGROWTH OF 1201 AND 0201 STRUCTURES

被引：21

作者：

MARTIN, C

MAIGNAN, A

HUVE, M

HERVIEU, M

MICHEL, C

RAVEAU, B

机构：

[1] Laboratoire CRISMAT, ISMRA, 14050 Caen Cedex, Boulevard du Maréchal Juin

来源：

PHYSICA C | 1991年 / 179卷 / 1-3期

关键词：

D O I：

10.1016/0921-4534(91)90003-H

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A new superconductive thallium cuprate, TlBa1.6La2.4Cu2O9 +/- delta has been isolated. The structure of this oxide has been studied by HREM and powder X-ray diffraction. It crystallizes in the space group I4/mmm with a = 3.8110(2) angstrom and c = 31.556(2) angstrom. The structure consists of a regular intergrowth of single and double rock salt layers with single perovskite layers. It can be described as a regular intergrowth of La2CuO4- and TlBa2CuO5-type structures. Very few crystals exhibit extended defects. The magnetic susceptibility measurements show a T(c) of 35 K for the as-synthesized material, which can be increased up to 42 K by Ar/H2 annealing at low temperature.

引用

页码：1 / 8

页数：8

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