Regensburg 2007 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 15: Poster:ThinFilms(1-33),Transp.(34-49),ExchBias(50-56),
Spindynamics(57-70),Micro-nanostr.Mat.(71-82),
Particles/Clust.(83-88), Mag.Imag./Surface(89-96),
Spinelectronics(97-109), Theory/Micromag.(110-116),
Spinstruct/Phasetr.(117-128),Magn.Mat.(129-139),
Aniso.+Measuring(140-145), MolMag.(146-152),
MSMA(153-156)
MA 15.124: Poster
Dienstag, 27. März 2007, 15:00–19:00, Poster A
Frustrated Ising- and Heisenberg-type Spin Systems on a Hexagonal Lattice — Carsten Olbrich1,2, •Tim Kunze1, Sibylle Gemming1,3, Klaus Morawetz1,4, and Michael Schreiber1 — 1Institute of Physics, Chemnitz University of Technology, 09107 Chemnitz, Germany — 2School of Engineering and Science, Jacobs University Bremen, 28725 Bremen, Germany — 3Forschungszentrum Dresden-Rossendorf, PF 51 01 19, 01314 Dresden, Germany — 4Max Planck Institute for the Physics of Complex Systems, Noethnitzer Str. 38, 01187 Dresden, Germany
The low-temperature behaviour of Ising- and Heisenberg-type spin systems on a periodically repeated hexagonal lattice is investigated by Metropolis-Monte-Carlo simulations. The correlation between various realisations of the local coupling and the order-disorder phase transitions is studied as a function of the external magnetic field. Entropy effects are estimated by thermodynamic integration. Due to frustration effects complex spin patterns are obtained and analysed in specific parameter regimes.