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Systematic Analysis of Micromagnetic Switching Processes

✍ Scribed by A. Hubert; W. Rave


Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
316 KB
Volume
211
Category
Article
ISSN
0370-1972

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✦ Synopsis


Guided by the properties of the Stoner-Wohlfarth model, the switching behavior of general inhomogeneous micromagnetic configurations is investigated. In most cases the extrapolation of a suitably defined local susceptibility to infinity is demonstrated to lead to the switching point. Only conventional tools of numerical micromagnetics are needed in this calculation. For certain, symmetric classes of switching events we have to resort to indirect methods to determine the switching fields. Examples for the successful application of the proposed methods to various switching phenomena in cube-shaped particles with uniaxial anisotropy are given to validate the procedures.

Ausgehend vom Verhalten von Stoner-Wohlfarth-Teilchen wird das Schaltverfahren beliebiger mikromagnetischer Konfigurationen untersucht. In den meisten Fa È llen erweist sich die Extrapolation einer geeignet definierten lokalen Suszeptibilita È t auf unendlich als geeigneter Ansatz zur Bestimmung der Schaltfeldsta È rke. Derartige Rechnungen lassen sich mit konventionellen Methoden des numerischen Mikromagnetismus durchfu È hren. In besonderen, symmetrischen Situationen sind allerdings zusa È tzliche, indirekte Methoden erforderlich. Am Beispiel verschiedener Schaltprozesse wu È rfelfo È rmiger, magnetisch einachsiger Teilchen wird die Leistungsfa È higkeit der vorgeschlagenen Rechenverfahren demonstriert.


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