Repository logo

Browsing by Subject "graf linków"

Filter results by typing the first few letters
Now showing 1 - 1 of 1
  • thumbnail.journal.alt
    Item type:Doctoral Dissertation, Access status: Open Access ,
    Wpływ frustracji na własności sieci Erdősa-Rényi z oddziaływaniem antyferromagnetycznym w modelu Isinga
    (2008-01-21) (Data obrony: 2011-03-07) Mańka-Krasoń, Anna
    Wydział Fizyki i Informatyki Stosowanej
    We consider random networks with enhanced clusterization and Ising spins s=±l at the network nodes. Mutually linked spins interact antiferromagnetically along the links. The clusterization is controlled by adding new links between neighbours of the same sites. The density of frustration varies with the clustering coefficient C. We investigate following models: 1) Erdős-Renyi networks; 2) regular networks where k=3; 3) pseudoregular networks where k=3 or k=5; 4) spatial networks; 5) line graphs. Magnetic properties such as the magnetic specific heat, the spin susceptibility and the Edwards-Anderson parameter of the system are calculated with the Monte Carlo heat-bath algorithm. Our main result is the transition temperature TSG dependence on the clustering coefficient C: TSG decreases with C, contrary to the Bethe approximation. This result match the behaviour of some real magnetic systems.