We present a model for the study of the hysteretic behavior of a disordered ferromagnetic system with an array of parallel Bloch domain walls. We write the equations of motion of the walls under an external magnetic field driving, considering long-range dipolar interactions and disorder. We calculate analytically an expression for the magnetic susceptivity Z, and find a logarithmic dependence for Z on the number of domains. We study the dynamic hysteresis, which behavior could be explained by the theory of loss separation. (c) 2007 Published by Elsevier B.V.
Dipolar interactions in ferromagnetic systems: Dynamic hysteresis from parallel domain walls
Zapperi S;
2008
Abstract
We present a model for the study of the hysteretic behavior of a disordered ferromagnetic system with an array of parallel Bloch domain walls. We write the equations of motion of the walls under an external magnetic field driving, considering long-range dipolar interactions and disorder. We calculate analytically an expression for the magnetic susceptivity Z, and find a logarithmic dependence for Z on the number of domains. We study the dynamic hysteresis, which behavior could be explained by the theory of loss separation. (c) 2007 Published by Elsevier B.V.File in questo prodotto:
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