Berlin 2008 – scientific programme
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DY: Fachverband Dynamik und Statistische Physik
DY 6: Ferrofluids
DY 6.2: Talk
Monday, February 25, 2008, 14:45–15:00, A 053
Ground state structures in ferrofluid monolayers: theory and simulations — •Sofia Kantorovich1,2, Taisiya Prokop'eva2, Victor Danilov2, and Christian Holm1,3 — 1MPI-P, Ackermannweg 10, D-55128, Mainz, Germany — 2USU, Lenin av. 51, 620083, Ekaterinburg, Russia — 3FIAS, Ruth-Moufang-Str 1, D-60438, Frankfurt am Main, Germany
A combination of analytical calculations and Monte Carlo simulations was used to find the ground state structures in ferrofluid monolayers. Taking into account the magnetic dipole-dipole interaction between all particles in the system, and treating ferroparticles as hard spheres, we found different topological structures that were probable for low temperatures. It turned out that among the most energetically advantageous are rings, double rings and vortex structures. However, we have shown a single ideal ring to be the most probable ground state structure for a ferrofluid monolayer. We compared extensively theoretical predictions to the results of computer simulations and found them to be in a very nice agreement.