Magnetic property of Ba2CoGe2O7

被引：25

作者：

Sato, T ^{[1
]}

Masuda, T ^{[1
]}

Uchinokura, K ^{[1
]}

机构：

[1] Univ Tokyo, Dept Adv Mat Sci, Bunkyo Ku, Tokyo 1138656, Japan

来源：

PHYSICA B-CONDENSED MATTER | 2003年 / 329卷

关键词：

2D spiral antiferromagnetism; magnetization measurement; weak ferromagnetism;

D O I：

10.1016/S0921-4526(02)02551-6

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

A two-dimensional antiferromagnet (S = 3/2), Ba2CoGe2O7, was studied, which is isostructural to S = 1/2 spiral antiferromagnet, Ba2CuGe2O7. A single crystal of Ba2CoGe2O7 was grown and its magnetization was measured. A weak ferromagnetism was observed at 6.7 K, while the spiral antiferromagnetism was reported in Ba2CuGe2O7. The origin of the ordered states in these isostructural materials are Dzyaloshinskii-Moriya interaction and the change of the direction of D vector results in the different spin configurations. We have also synthesized polycrystalline samples of Ba2Cu1-xCoxGe2O7, and observed the change of the ordered state with x. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：880 / 881

页数：2

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