Regensburg 2013 – scientific programme

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MA: Fachverband Magnetismus

MA 26: Magnetic Thin Films I of 2

MA 26.3: Talk

Wednesday, March 13, 2013, 10:00–10:15, H3

Pattern formation in the dipolar Ising model on a two-dimensional honeycomb lattice — •Robert Rüger and Roser Valentí — Institut für Theoretische Physik, Goethe-Universität Frankfurt, Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany

The two-dimensional Ising model with ferromagnetic nearest-neighbor interactions and long-range antiferromagnetic interactions is probably the simplest model system for the formation of magnetic domains. We present Monte Carlo simulation results for such a system on the honeycomb lattice and compare those to the known case of the square lattice in order to investigate the underlying lattice's influence on the formation of magnetic domain patterns. To deal with the long-range nature of the dipolar interaction we also present a simple method of evaluating effective interaction coefficients, which can be regarded as a more straightforward alternative to the prevalent Ewald summation techniques.