Room temperature ferromagnetic phase in ZnO-MnO2 system via solid-state reaction

被引：5

作者：

Tanaka, Katsuhisa ^{[1
]}

Fukui, Kazuya ^{[1
]}

Murai, Shunsuke ^{[1
]}

Fujita, Koji ^{[1
]}

机构：

[1] Kyoto Univ, Grad Sch Engn, Dept Mat Chem, Kyoto 6158510, Japan

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2007年 / 310卷 / 02期

关键词：

zinc oxide; manganese dioxide; mechanical milling; magnetization; ferromagnetism;

D O I：

10.1016/j.jmmm.2006.10.1021

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Only mechanical milling of a mixture of powders composed of MnO2 and ZnO brings about a phase which exhibits ferromagnetic behavior at room temperature. The sample just after the mechanical milling without any heat treatments at elevated temperatures clearly manifests a hysteresis loop in magnetic field dependence of magnetization at 300 K; the residual magnetization is 2.84 x 10(-4) emu/g and the coercive force is 76Oe. It should be emphasized that the residual magnetization rather decreases when the as-milled sample is heat treated. The ferromagnetic behavior is thought to be attributed to Zn-doped manganese oxide phase formed on the surface region of MnO2 particles. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：2095 / 2096

页数：2

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