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Journal of Nanomaterials
Volume 2015, Article ID 982174, 6 pages
http://dx.doi.org/10.1155/2015/982174
Research Article

Clarification of the Magnetocapacitance Mechanism for Fe3O4-PDMS Nanocomposites

1Key Laboratory of Instrumentation Science & Dynamic Measurement, Ministry of Education, North University of China, Taiyuan, Shanxi 030051, China
2Department of Mechatronic Engineering, Zeda Vocational & Technical College, Suqian, Jiangsu 223800, China
3Science and Technology on Electronic Test & Measurement Laboratory, North University of China, Taiyuan, Shanxi 030051, China

Received 30 June 2014; Accepted 1 September 2014

Academic Editor: Mikael Motelica-Heino

Copyright © 2015 Chen Guobin et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We mainly focused on the magnetocapacitance effect of Fe3O4-PDMS nanocomposites. We also proposed the preparation method and measured microstructures, magnetic properties, and magnetocapacitance value of the nanocomposites. The magnetocapacitance measurement results show that the nanocomposites have magnetocapacitance property, the magnetocapacitance with magnetic field depends on the magnetic property, and the value at the same magnetic field is increasing with the volume fraction of Fe3O4 nanoparticles. The magnetocapacitance model is proposed to explain this phenomenon by analyzing the magnetic interaction between particles and the viscoelasticity of PDMS. We also calculated the theoretical capacitance value of all samples using the magnetization of nanoparticles and mechanical parameters of PDMS. From the theoretical values, it is concluded that the model we proposed can well explain the magnetocapacitance effect of Fe3O4-PDMS nanocomposites.