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Phase separation dynamics in a two-dimensional magnetic mixture

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journal contribution
posted on 17.05.2013 by K. Lichtner, Andrew Archer, S.H.L. Klapp
Based on classical density functional theory (DFT), we investigate the demixing phase transition of a two-dimensional, binary Heisenberg fluid mixture. The particles in the mixture are modeled as Gaussian soft spheres, where one component is characterized by an additional classical spin-spin interaction of Heisenberg type. Within the DFT we treat the particle interactions using a mean-field approximation. For certain magnetic coupling strengths, we calculate phase diagrams in the density-concentration plane. For sufficiently large coupling strengths and densities, we find a demixing phase transition driven by the ferromagnetic interactions of the magnetic species. We also provide a microscopic description (i.e., density profiles) of the resulting non-magnetic/magnetic fluid-fluid interface. Finally, we investigate the phase separation using dynamical density functional theory, considering both nucleation processes and spinodal demixing.

History

School

  • Science

Department

  • Mathematical Sciences

Citation

LICHTNER, K., ARCHER, A.J. and KLAPP, S.H.L., 2012. Phase separation dynamics in a two-dimensional magnetic mixture. Journal of Chemical Physics, 136 (2), 024502, 14pp.

Publisher

© American Institute of Physics (AIP)

Version

VoR (Version of Record)

Publication date

2012

Notes

This article was published in the Journal of Chemical Physics [© American Institute of Physics (AIP)].

ISSN

0021-9606

Language

en

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