dc.contributor.author | Nikolaisen, Even Sunnanå | |
dc.contributor.author | Fabian, Karl | |
dc.contributor.author | Harrison, J. Richard | |
dc.contributor.author | McEnroe, Suzanne | |
dc.date.accessioned | 2022-10-24T11:48:43Z | |
dc.date.available | 2022-10-24T11:48:43Z | |
dc.date.created | 2022-10-22T21:48:06Z | |
dc.date.issued | 2022 | |
dc.identifier.issn | 0094-8276 | |
dc.identifier.uri | https://hdl.handle.net/11250/3027919 | |
dc.description.abstract | Anisotropy of magnetic susceptibility (AMS) is commonly used to assess sedimentation, deformation, tectonics, rock fabric, and texture. Using focused-ion beam nanotomography, we develop a micromagnetic method to investigate the AMS of individual magnetite inclusions in silicates across the transition between single-domain (SD) to multidomain behavior. We calculate individual AMS tensors by modeling the magnetization response of a particle to weak applied fields in three orthogonal directions. The main AMS mode of elongated SD particles is not a homogeneous magnetization rotation, but focused alignment of spins at their edges and tips. In single-vortex particles, vortex displacement is the dominant AMS mode, which focuses the largest magnetization changes in a planar region containing the vortex core, and perpendicular to the direction of vortex motion. In multi-vortex structures a combined motion of all vortex centers can lead to high degrees of anisotropy when some motion patterns are energetically much easier to achieve than others. | en_US |
dc.description.abstract | Micromagnetic Modes of Anisotropy of Magnetic Susceptibility in Natural Magnetite Particles | en_US |
dc.language.iso | eng | en_US |
dc.publisher | Wiley | en_US |
dc.rights | Navngivelse 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/deed.no | * |
dc.title | Micromagnetic Modes of Anisotropy of Magnetic Susceptibility in Natural Magnetite Particles | en_US |
dc.title.alternative | Micromagnetic Modes of Anisotropy of Magnetic Susceptibility in Natural Magnetite Particles | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.description.version | publishedVersion | en_US |
dc.source.journal | Geophysical Research Letters | en_US |
dc.identifier.doi | 10.1029/2022GL099758 | |
dc.identifier.cristin | 2064008 | |
dc.relation.project | Norges teknisk-naturvitenskapelige universitet: 81771047 | en_US |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 2 | |