Cation distribution of MnFe2O4 nanoparticles synthesized under an induced magnetic field

被引：16

作者：

Wang, Jun ^{[1
]}

Wu, Yejun ^{[1
]}

Zhu, Yuejin ^{[1
]}

机构：

[1] Ningbo Univ, Dept Phys, Ningbo 315211, Peoples R China

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2007年 / 21卷 / 05期

关键词：

cation distribution; nanoparticles; magnetic properties;

D O I：

10.1142/S0217979207036606

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Nanoparticles of MnFe2O4 have been synthesized under an induced magnetic field by a hydrothermal process. A strong correlation between the cation distribution and the magnetic properties of MnFe2O4 nanoparticles has been identified. From the results of Mossbauer spectroscopy it has been found that the nanoparticles synthesized under zero magnetic fields have 21% inversion occupancy in the tetrahedral sites by Fe3+ cations, while this value decreases to 10% in the sample formed under a 0.25 T magnetic field. The results explain well the decrease in saturation magnetization from 62.2 emu/g to 52.8 emu/g for the sample formed under a magnetic field. This provides an understanding on how to control the inner structure in order to control the magnetic properties of these spinel ferrite nanoparticles.

引用

页码：723 / 729

页数：7

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