Effects of temperature and atmosphere on the magnetism properties of Mn-doped ZnO

被引：50

作者：

Chen, W ^{[1
]}

Zhao, LF ^{[1
]}

Wang, YQ ^{[1
]}

Miao, JH ^{[1
]}

Liu, S ^{[1
]}

Xia, ZC ^{[1
]}

Yuan, SL ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Dept Phys, Wuhan 430074, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2005年 / 87卷 / 04期

关键词：

D O I：

10.1063/1.1952570

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Magnetic properties of Mn-doped ZnO (Zn0.98Mn0.02O) bulk materials prepared by the solid-state reaction method were investigated by measuring magnetization as functions of temperature and magnetic field. The special feature of our sample preparation was the low-temperature processing. When high-temperature (T > 700 degrees C) was used, secondary phase was found. The results indicate that the samples sintered in Ar gas show ferromagnetic behavior at room temperature, but it disappears in samples sintered in air. Even for ferromagnetic samples, the obtained saturation value of magnetization is much smaller than the theoretical value, suggesting the possibility that there is a strong antiferromagnetic exchange coupling in this kind of compound. (c) 2005 American Institute of Physics.

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