We study the effect of long-range dipolar forces on the dynamics and morphology of domain walls in magnetic thin films by numerical simulations of the spin-1 random-field Ising model. By studying the size distribution of avalanches of domain-wall motion arising as a response to quasistatic external driving, we observe a crossover from the case dominated by short-range interactions to another universality class where the long-range dipolar forces become important. This crossover is accompanied with a change of the domain-wall morphology from a rough wall to walls with a zigzag structure.
Effect of Dipolar Interactions for Domain-Wall Dynamics in Magnetic Thin Films / A. Mughal, L. Laurson, G. Durin, S. Zapperi. - In: IEEE TRANSACTIONS ON MAGNETICS. - ISSN 0018-9464. - 46:2(2010 Feb), pp. 228-230. ((Intervento presentato al 19. convegno International Conference on Soft Magnetic Materials tenutosi a Torino nel 2009.
Effect of Dipolar Interactions for Domain-Wall Dynamics in Magnetic Thin Films
S. Zapperi
2010
Abstract
We study the effect of long-range dipolar forces on the dynamics and morphology of domain walls in magnetic thin films by numerical simulations of the spin-1 random-field Ising model. By studying the size distribution of avalanches of domain-wall motion arising as a response to quasistatic external driving, we observe a crossover from the case dominated by short-range interactions to another universality class where the long-range dipolar forces become important. This crossover is accompanied with a change of the domain-wall morphology from a rough wall to walls with a zigzag structure.File | Dimensione | Formato | |
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