Resistive magnetodielectric property of polycrystalline γ-Fe2O3

被引：29

作者：

Bonaedy, T. ^{[1
]}

Koo, Y. S. ^{[1
]}

Sung, K. D. ^{[1
]}

Jung, J. H. ^{[1
]}

机构：

[1] Inha Univ, Dept Phys, Inchon 402751, South Korea

来源：

APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 13期

关键词：

D O I：

10.1063/1.2790474

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have systematically investigated the magnetodielectric property of polycrystalline gamma-Fe2O3. The dielectric constants of gamma-Fe2O3 seem to follow the Maxwell-Wagner model, i.e., their large enhancement and strong temperature and frequency dependences. Positive magnetodielectric property is observed with negative magnetoresistance, at least above 180 K. The value of magnetodielectric effect is maximized at the specific frequency, which is inversely proportional to resistivity. Based on the Maxwell-Wagner model and the magnetoresistance, we can reproduce the magnetodielectric effect of gamma-Fe2O3.

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页数：3

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