Interface Motion in Disordered Ferromagnets |
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Authors: | L. Roters S. Lübeck K.D. Usadel |
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Affiliation: | Theoretische Tieftemperaturphysik , Gerhard-Mercator-Universit?t Duisburg , Duisburg , 47048 , Germany |
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Abstract: | We consider numerically the depinning transition in the random-field Ising model. Our analysis reveals that the three and four dimensional model displays a simple scaling behavior whereas the five dimensional scaling behavior is affected by logarithmic corrections. This suggests that d = 5 is the upper critical dimension of the depinning transition in the random-field Ising model. Furthermore, we investigate the so-called creep regime (small driving fields and temperatures) where the interface velocity is given by an Arrhenius law. |
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Keywords: | Disordered Media Driven Interfaces Numerical Investigations Non-equilibrium Phase Transitions Creep Motion |
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