Structural defects effect on ferromagnetism of layered oxysulfide (La1-xCaxO)Cu1-xNixS

被引：7

作者：

Takase, K ^{[1
]}

Shimizu, T

Makihara, K

Takahashi, Y

Takano, Y

Sekizawa, K

Kuroiwa, Y

Aoyagi, S

Utsumi, A

机构：

[1] Nihon Univ, Coll Sci & Technol, Tokyo 1018308, Japan

[2] Okayama Univ, Dept Phys, Okayama 7008530, Japan

来源：

PHYSICA B-CONDENSED MATTER | 2003年 / 329卷

关键词：

oxysulfide; wide-gap semiconductor; structural defects; ferromagnetism;

D O I：

10.1016/S0921-4526(02)02623-6

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We have studied the effect of structural defects on magnetic properties of (La1-xCaxO)Cu1-xNixS. The magnetization for samples containing less defects shows the magnetism consisting of a diamagnetism and a Pauli paramagnetism. Any ordered phase is not observed down to 2 K. A very weak ferromagnetic component is observed for non-stoichiometric system containing structural defects. These samples exhibit a well-defined hysteresis loop at room temperature. The Curie temperature obtained by the extrapolation of its temperature dependence increases with x. This ferromagnetism may be attributed to Ni and/or S related defects. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：961 / 962

页数：2

共 3 条

[1] PREPARATION AND ELECTRICAL-PROPERTIES OF (LAO)AGS AND (LNO)CUS (LN = LA, PR, OR ND) [J].