Influence of double electrical layers on the diffusion of magnetic particles in the ionic magnetic fluids

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• 作者：Gogosov ; V.V. ; Shaposhnikova ; G.A.
• 关键词：Ionic magnetic fluids ; Double electrical layers ; Diffusion coefficient
• 刊名：Journal of Magnetism and Magnetic Materials
• 出版年：2003
• 期刊代码：31_03048853
• 类别：ph
• 出版时间：March, 2003
• 卷：258-259
• 期：Complete
• 页码：436-438
• 文件大小：84.0 K

摘要

The presence of the force F_dl, acting on the particles with double electrical layers in the ionic magnetic fluids during nonuniform particle distribution in the space, is discussed. This force is analogous to force F_B, caused by Brown motion of the “gas” of the particles. Introducing relation λ=F_dl/F_B, it is possible to find corrections to the diffusion coefficients. The dependence of value λ from the parameters of magnetic fluid is investigated. It is shown that this correction can be essential for the highly concentrated magnetic fluids.