Disorder and coercivity in magnetic particle systems

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Disorder and coercivity in magnetic particle systems

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dc.contributor.author Zhao, Yang
dc.contributor.author Bertram, H. Neal
dc.date.accessioned 2011-05-09T04:28:59Z
dc.date.available 2011-05-09T04:28:59Z
dc.date.copyright 1992
dc.date.issued 2011-05-09T04:28:59Z
dc.identifier.citation Zhao, Y., & Bertram, H. N. (1992). Disorder and coercivity in magnetic particle systems. Journal of Magnetism and Magnetic Materials, 114(3), 329-335.
dc.identifier.uri http://hdl.handle.net/10220/6776
dc.description.abstract Computer simulation has been utilized to understand the hysteretic behavior of magnetic particle systems. Particles are assumed to be single domain, spherical in shape, and possess no intrinsic anisotropy. Neighboring spins are not exchange-coupled. Particles are either randomly packed or displaced from cubic lattice positions in random directions. The gyromagnetic equation of motion with Landau-Lifshitz damping is solved for each spin during a dynamic process. Regular spin arrangements yield no hysteresis or coercivity. For spin configurations randomly displaced from a cubic lattice, hysteretic behavior is observed. Coercivity increases with randomness of particle position. Detailed examination of the magnetization reversals reveals chain formations and transient vortex states in randomly packed arrays. Coercivity versus packing fraction inferred for finite sized particles shows a maximum.
dc.format.extent 15 p.
dc.language.iso en
dc.relation.ispartofseries Journal of magnetism and magnetic materials
dc.rights ©1992 Elsevier This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of Magnetism and Magnetic Materials, Elsevier. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [DOI: http://dx.doi.org/10.1016/0304-8853(92)90275-S].
dc.subject DRNTU::Engineering::Materials::Magnetic materials
dc.title Disorder and coercivity in magnetic particle systems
dc.type Journal Article
dc.contributor.school School of Materials Science and Engineering
dc.identifier.doi http://dx.doi.org/10.1016/0304-8853(92)90275-S
dc.description.version Accepted version

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