Representation of Memory in Particle Assembly Hysteresis Models

We have developed a mathematical tool able to track irreversible processes in magnetic systems described by the Stoner-Wohlfarth model, under any applied field history. A graphic representation is worked out that accounts for interactions, and turns out to be an extension of the one operating in the...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2009-11, Vol.45 (11), p.5184-5187
Main Author: Appino, C.
Format: Article
Language:English
Subjects:
Assembly
Cross-disciplinary physics: materials science
rheology
Energy loss
Entropy
Exact sciences and technology
Graphics
History
Local and non-local memory in magnetic systems
Magnetic hysteresis
Magnetic materials
Magnetism
Magnetization
Materials science
Mathematical model
Other topics in materials science
Physics
Production systems
Stoner-Wohlfarth theory
vector magnetization models
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Description
Summary:We have developed a mathematical tool able to track irreversible processes in magnetic systems described by the Stoner-Wohlfarth model, under any applied field history. A graphic representation is worked out that accounts for interactions, and turns out to be an extension of the one operating in the Preisach model. The response to alternating and rotating magnetizing fields have been investigated in detail. We have found a strategy in dealing with hysteretic memory effects which speeds the computational work needed to get the materials magnetization. This approach can represent a suitable tool aimed at estimate the energy loss and entropy production in magnetic systems.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2009.2031068