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Demagnetization factors for cylindrical shells and related shapes
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SYSNO ASEP 0350362 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Demagnetization factors for cylindrical shells and related shapes Author(s) Beleggia, M. (GB)
Vokoun, David (FZU-D) RID, ORCID
De Graef, M. (US)Source Title Journal of Magnetism and Magnetic Materials. - : Elsevier - ISSN 0304-8853
Roč. 321, č. 9 (2009), s. 1306-1315Number of pages 10 s. Language eng - English Country NL - Netherlands Keywords demagnetization factor ; magnetostaticenergy ; nano-ring ; core-shell ; dipolar interaction ; shape anisotropy Subject RIV BM - Solid Matter Physics ; Magnetism CEZ AV0Z10100520 - FZU-D (2005-2011) UT WOS 000264170500039 DOI 10.1016/j.jmmm.2008.11.046 Annotation Magnetostatic self and interaction energies can be computed via demagnetization factors whenever the magnetic state is close to a uniform state, e.g. in the presence of a strong applied field, or when the dimensions involved are within the single-domain limit. We derive an alytical expressions for the demagnetization factors of cylindrical shells and rings with rectangular and square cross-sections. The factors are given either as a combination of elliptic integrals or as a series expansion in powers of the dimensionless ratio between inner and outer radii. Limiting cases are analysed for particular ranges of the shape parameters. We also investigate the ring with a square cross-section, and the elliptic ring, where analytical expressions are provided only forsmall eccentricity. Finally, we introduce the dipolar coupling integral encoding magnetostatic interactions between a magnetized cylinder and a thin coating on its lateral surface. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2011
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