Investigation of magnetic properties of interacting Fe2O3 nanoparticles

被引：138

作者：

Zysler, RD ^{[1
]}

Fiorani, D ^{[1
]}

Testa, AM ^{[1
]}

机构：

[1] ICMAT, CNR, Area Ric Roma, Monterotondo Stn, I-00016 Monterotondo, Italy

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2001年 / 224卷 / 01期

关键词：

fine particles; hematite; irreversible magnetization; weak ferromagnetism;

D O I：

10.1016/S0304-8853(00)01328-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The magnetic properties of Fe2O3 nanoparticles (average diameter O congruent to 3 nm) in alumina (68% Fe2O3 in weight) have been investigated by magnetization measurements. The results indicate a superparamagnetic behavior of interacting particles, which block with decreasing temperature (the zero-field-cooled susceptibility shows a maximum at T congruent to 145 K) with a distribution of relaxation times. A change of magnetic regime is observed below similar to 60 K, due to the increasing interparticle interactions and local surface anisotropy. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：5 / 11

页数：7

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