Regensburg 2010 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 41: Nanoparticles and Composite Materials II
CPP 41.10: Talk
Thursday, March 25, 2010, 16:30–16:45, H48
Ground state structures in ferrofluid monolayers: influence of an external magnetic field — •Taisia Prokopieva1, Victor Danilov1, Sofia Kantorovich1,2, and Christian Holm2 — 1Ural State University, Ekaterinburg, Russia — 2ICP, University of Stuttgart, Stuttgart, Germany
More and more attention is given to ferrofluid monolayers recently because they find different applications in various disciplines. Based on our previous results [Prokopieva et al. Phys. Rev. E (2009), V.80, P. 031404], we investigate the microstructure of ferrofluid thin films at low temperatures under applied external magnetic field. Using a combination of analytical methods and Monte Carlo simulations we have studied the ground state structures in two cases: the field aligned perpendicular and parallel to the layer. The crucial influence of the external field is demonstrated. We find different configurations for different magnetic fields. The critical parameters of structural transitions for different fields are proved to depend on the number of particles in the system.
The results of the ground state structures in the presence of the external field will be used to understand the microstructure of ferrofluid monolayers at room temperatures.