ON AGGREGATION PHENOMENA IN MAGNETIC FLUIDS BY THE TUNNEL THEORY AND MONTE-CARLO SIMULATIONS

被引：12

作者：

SATOH, A ^{[1
]}

KAMIYAMA, SI ^{[1
]}

机构：

[1] TOHOKU UNIV,INST FLUID SCI,AOBA KU,SENDAI,MIYAGI 980,JAPAN

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 1995年 / 172卷 / 01期

关键词：

MAGNETIC FLUIDS; AGGREGATION; TUNNEL THEORY; MONTE CARLO SIMULATIONS;

D O I：

10.1006/jcis.1995.1222

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We extend the theory of the ''tunnel model'' to the case of aggregation phenomena in magnetic fluids, which is valid for strong magnetic fields. Our model takes into account cluster-cluster interactions and is used to investigate the aggregation phenomena in a uniform applied magnetic field. Furthermore, Monte Carlo simulations have been carried out to clarify the aggregate structures of ferromagnetic particles, using our cluster-moving Monte Carlo algorithm. The main results obtained here may be summarized as follows: (a) the number densities of particles have an influence on the sizes of clusters, namely, the larger the number density becomes, the longer the clusters that are formed, (b) the size of a cluster increases exponentially with the strength of the magnetic interactions between particles, (c) the number density of large clusters also increases as particle-particle interactions become large, and (d) the results of the tunnel theory are in qualitative agreement with those of Monte Carlo simulations. (C) 1995 Academic Press, Inc.

引用

页码：37 / 47

页数：11

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