Interface Motion in Disordered Ferromagnets

Roters, L.; Lubeck, S.; Usadel, K. D.

Interface Motion in Disordered Ferromagnets

Authors

Roters, L.

Lubeck, S.

Usadel, K. D.

Description

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.
some misprints corrected