The demagnetizing field of a non-uniform rectangular prism

Anders Smith; Kaspar Kirstein Nielsen; Dennis Christensen; Christian Robert Haffenden Bahl; Rasmus Bjørk; Jesper Henri Hattel

doi:10.1063/1.3385387

The demagnetizing field of a non-uniform rectangular prism

Anders Smith, Kaspar Kirstein Nielsen, Dennis Christensen, Christian Robert Haffenden Bahl, Rasmus Bjørk, Jesper Henri Hattel

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Abstract

The effect of demagnetization on the magnetic properties of a rectangular ferromagnetic prism under non-uniform conditions is investigated. A numerical model for solving the spatially varying internal magnetic field is developed, validated and applied to relevant cases. The demagnetizing field is solved by an analytical calculation and the coupling between applied field, the demagnetization tensor field and spatially varying temperature is solved through iteration. We show that the demagnetizing field is of great importance in many cases and that it is necessary to take into account the non-uniformity of the internal field, especially for non-constant temperature distributions and composite magnetic materials.

Original language	English
Journal	Journal of Applied Physics
Volume	107
Issue number	10
Pages (from-to)	103910
ISSN	0021-8979
DOIs	https://doi.org/10.1063/1.3385387
Publication status	Published - 2010

Bibliographical note

Copyright (2010) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.

Keywords

Magnetic refrigeration
Magnetic field
Fuel cells and hydrogen
Demagnetization

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http://jap.aip.org/japiau/v107/i10/p103910_s1

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abstract = "The effect of demagnetization on the magnetic properties of a rectangular ferromagnetic prism under non-uniform conditions is investigated. A numerical model for solving the spatially varying internal magnetic field is developed, validated and applied to relevant cases. The demagnetizing field is solved by an analytical calculation and the coupling between applied field, the demagnetization tensor field and spatially varying temperature is solved through iteration. We show that the demagnetizing field is of great importance in many cases and that it is necessary to take into account the non-uniformity of the internal field, especially for non-constant temperature distributions and composite magnetic materials.",

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AU - Bjørk, Rasmus

AU - Hattel, Jesper Henri

N1 - Copyright (2010) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.

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Y1 - 2010

N2 - The effect of demagnetization on the magnetic properties of a rectangular ferromagnetic prism under non-uniform conditions is investigated. A numerical model for solving the spatially varying internal magnetic field is developed, validated and applied to relevant cases. The demagnetizing field is solved by an analytical calculation and the coupling between applied field, the demagnetization tensor field and spatially varying temperature is solved through iteration. We show that the demagnetizing field is of great importance in many cases and that it is necessary to take into account the non-uniformity of the internal field, especially for non-constant temperature distributions and composite magnetic materials.

AB - The effect of demagnetization on the magnetic properties of a rectangular ferromagnetic prism under non-uniform conditions is investigated. A numerical model for solving the spatially varying internal magnetic field is developed, validated and applied to relevant cases. The demagnetizing field is solved by an analytical calculation and the coupling between applied field, the demagnetization tensor field and spatially varying temperature is solved through iteration. We show that the demagnetizing field is of great importance in many cases and that it is necessary to take into account the non-uniformity of the internal field, especially for non-constant temperature distributions and composite magnetic materials.

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KW - Magnetic field

KW - Fuel cells and hydrogen

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KW - Magnetisk køling

KW - Brændselsceller og brint

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The demagnetizing field of a non-uniform rectangular prism

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