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| Author(s): |
Paulo Roberto de Araujo Campos
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | São Carlos. |
| Institution: | Universidade de São Paulo (USP). Instituto de Física de São Carlos (IFSC/BT) |
| Defense date: | 1998-02-27 |
| Examining board members: |
Roberto Nicolau Onody;
Francisco Castilho Alcaraz;
Carlos Eugenio Imbassahy Carneiro
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| Advisor: | Roberto Nicolau Onody |
| Abstract | |
We extend the Wolff Algorithm to include correlated spin interactions in diluted magnetic systems. This algorithm is applied to study the site-bond-correlated Ising model on a two-dimensional square lattice. We use a finite-size scaling procedure to obtain the phase diagram in the temperature-concentration space. Our results are in excellent agreement with the experimental data for the Knip Mg1-pF3, compound. We also present the critical dynamical behavior of the Wolff algorithm for this system. We have verified that the autocorrelation time diminishes in the presence of dilution and correlation, showing that the Wolff algorithm performs even better in such situations. This behavior is completely different from those exhibited by the single spin-flips algorithms. (AU) | |