Effect of CoTiO3 formation on the magnetic properties of co-doped TiO2 rutile

被引：0

作者：

Joh, YG ^{[1
]}

Kim, HD

Kim, BY

Woo, SI

Moon, SH

Cho, JH

Kim, EC

Kim, DH

Cho, CR

机构：

[1] Yeungnam Univ, Dept Phys, Kyongsan 712749, South Korea

[2] Korea Basic Res Inst, Busan Branch, Pusan 609753, South Korea

来源：

JOURNAL OF THE KOREAN PHYSICAL SOCIETY | 2004年 / 44卷 / 02期

关键词：

magnetic semiconductors; hysteresis; solid-state reaction; ferromagnetism;

D O I：

暂无

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We studied the structural and the magnetic properties of TiO2 rutile powder with various Co concentrations synthesized by using a solid-state reaction. For Co concentrations higher that 2 a second phase of CoTiO3 was observed on the X-ray diffraction (XRD) experiment. The magnetization measurement showed room-temperature ferromagnetism in this material, but the magnetic moment per Co atom decreased significantly as the Co concentration was increased. We attribute this reduction of magnetization to the formation of non-magnetic CoTiO3 complexes as probed by XRD. For samples with Co concentrations less than 2%, the observed ferromagnetism seemed to be due to an exchange interaction between substitutional or interstitial Co atoms rather than to Co clusters.

引用

页码：360 / 364

页数：5