Criticality in diluted ferromagnets
نویسندگان
چکیده
منابع مشابه
Criticality in diluted ferromagnet
We perform a detailed study of the critical behavior of the mean field diluted Ising ferromagnet by analytical and numerical tools. We obtain self-averaging for the magnetization and write down an expansion for the free energy close to the critical line. The scaling of the magnetization is also rigorously obtained and compared with extensive Monte Carlo simulations. We explain the transition fr...
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1 Institut für Theoretische Physik, Universität Leipzig, Augustusplatz 10/11, D-04109 Leipzig, Germany [email protected] 2 Groupe de Physique des Matériaux, Université de Rouen, F-76801 Saint-Etienne du Rouvray Cedex, France [email protected] 3 Laboratoire de Physique des Matériaux, Université Henri Poincaré, Nancy I, BP 239, F-54506 Vandœuvre les Nancy Cedex, France c...
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The distribution of magnetic moments in finite ferromagnetic bodies was first investigated by Landau an Lifshitz in a famous paper, where they obtained the domain structure of a ferromagnetic crystal at low temperatures, in the regime of saturated magnetization. We propose a generalization of the above approach, using from the start the Landau theory of phase transitions, where the free energy ...
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We consider a phi4 theory with a position-dependent distance from the critical point. One realization of this model is a classical ferromagnet subject to nonuniform mechanical stress. We find a sharp phase transition where the envelope of the local magnetization vanishes uniformly. The first-order transition in a quantum ferromagnet also remains sharp. The universal mechanism leading to a tricr...
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1 Groupe de Physique des Matériaux, Université de Rouen, F-76821 Mont Saint-Aignan Cedex, France [email protected] 2 Laboratoire de Physique des Matériaux, Université Henri Poincaré, Nancy I, BP 239, F-54506 Vandœuvre les Nancy Cedex, France chatelai, [email protected] 3 Institut für Theoretische Physik, Universität Leipzig, Augustusplatz 10/11, D-04109 Leipzig, Germany christophe...
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ژورنال
عنوان ژورنال: Journal of Statistical Mechanics: Theory and Experiment
سال: 2008
ISSN: 1742-5468
DOI: 10.1088/1742-5468/2008/10/p10003