| Autor: |
Tornau, E. E., Petrauskas, V., Joknys, A. |
| Předmět: |
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| Zdroj: |
Ferroelectrics; 2009, Vol. 379 Issue 1, p128-135, 8p, 6 Graphs |
| Abstrakt: |
Monte Carlo simulation of phase transitions to antiferromagnetic stripe phases are performed for square and triangular lattices. We employed Ising model with competing ferromagnetic nearest neighbour and antiferromagnetic dipolar interactions and calculated phase diagram for different values of exchange and dipolar interaction ratio. The order of transitions to stripe phases with different interaction ratio (stripe width) was determined. We have shown by using histogram method that for transition to the stripe phase AF1 with the smallest stripe width h = a (a is lattice constant) the order is different for square and triangular lattices. For a square lattice the first order phase transition is found only for transitions to AF2 (h = 2a) phase, the transitions to AF1 and AF3 (h = 3a) phases being continuous. For triangular lattice we determined first order phase transitions to AF1 and AF2 phases and second order phase transitions to AF3 and AF4 phases. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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