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- W2130945178 abstract "The Ising model, in the presence of a random field, is investigated within the mean-field approximation based on Landau expansion. The random field is drawn from the bimodal probability distribution P(h)=pδ(h−h0)+(1−p)δ(h+h0), where the probability p assumes any value within the interval [0,1], asymmetric distribution. The prevailing transitions are of second-order but, for some values of p and h0, first-order phase transitions take place for smaller temperatures and higher h0, thus confirming the existence of a tricritical point. Also, the possible reentrant phenomena in the phase diagram (T−h0 plane) occur for appropriate values of p and h0. Using the variational principle, we determine the equilibrium equation for magnetization and solve it for both transitions and at the tricritical point in order to determine the magnetization profile with respect to h0." @default.
- W2130945178 created "2016-06-24" @default.
- W2130945178 creator A5089890592 @default.
- W2130945178 date "2010-10-01" @default.
- W2130945178 modified "2023-09-27" @default.
- W2130945178 title "The random-field Ising model with asymmetric bimodal probability distribution" @default.
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- W2130945178 doi "https://doi.org/10.1016/j.physa.2010.05.033" @default.
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