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Statistical modeling of magnetic and magnetostrictive properties due to domain wall motion
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.
1999 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, ISSN 0021-8979, Vol. 85, no 8, 5190-5192 p.Article in journal (Refereed) Published
Abstract [en]

Statistical mechanics is employed to derive magnetic and magnetostrictive bulk properties of soft magnetic materials dominated by domain wall motion. The material is divided into an ensemble of volumes with uniform magnetization, each one much smaller than a typical domain but much larger than one atom. The energy for such a volume element is assumed to consist of an internal energy: the interaction with the external magnetic field and a mean field interaction with the surrounding medium. The volume fractions of discrete mesoscopic magnetizations in the medium are derived from Boltzmann statistics. The bulk magnetization is the weighted average of the mesoscopic values. Magnetostriction is treated in a similar way. Calculations are compared with two-dimensional measurements on grain-oriented silicon #x2013;iron. #xa9; 1999 American Institute of Physics.

Place, publisher, year, edition, pages
1999. Vol. 85, no 8, 5190-5192 p.
Keyword [en]
ferromagnetic materials;iron alloys;magnetic domain walls;magnetisation;magnetostriction;silicon alloys;soft magnetic materials;statistical mechanics
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
URN: urn:nbn:se:kth:diva-72126DOI: 10.1063/1.369120OAI: diva2:487204
NR 20140805Available from: 2012-01-31 Created: 2012-01-31Bibliographically approved

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Engdahl, Göran
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