Structure and magnetic properties of mono- and bi-dispersed ferrofluids as revealed by simulations

Huang, J. P., Wang, Z. and Holm, C. (2005) Structure and magnetic properties of mono- and bi-dispersed ferrofluids as revealed by simulations. Journal of Magnetism and Magnetic Materials, 289. pp. 234-237. ISSN 0304-8853 doi: 10.1016/j.jmmm.2004.11.067

Abstract/Summary

Using a Langevin molecular dynamics simulation, we show that the magnetic properties of a mono- and bi-dispersed ferrofluid system depend on the volume fraction and the dipolar coupling parameter. For the bi-dispersed system, most of the chains are formed by the large particles, but the aggregation behavior of the large particles is hindered by the presence of the small particles, which are predominantly attached to the end of the particle chain. To further elucidate the microscopic fluid structure, anisotropic structure factors are calculated.