{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1360011145679099136.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1029/2018jb015909"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F2018JB015909"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2018JB015909"}}],"dc:title":[{"@value":"The Vortex State in Geologic Materials: A Micromagnetic Perspective"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:title>Abstract</jats:title><jats:p>A wide variety of Earth and planetary materials are very good recorders of paleomagnetic information. However, most magnetic grains in these materials are not in the stable single domain grain size range but are larger and in nonuniform vortex magnetization states. We provide a detailed account of vortex phenomena in geologic materials by simulating first‐order reversal curves (FORCs) via finite‐element micromagnetic modeling of magnetite nanoparticles with realistic morphologies. The particles have been reconstructed from focused ion beam nanotomography of magnetite‐bearing obsidian and accommodate single and multiple vortex structures. Single vortex (SV) grains have fingerprints with contributions to both the transient and transient‐free zones of FORC diagrams. A fundamental feature of the SV fingerprint is a central ridge, representing a distribution of negative saturation vortex annihilation fields. SV irreversible events at multiple field values along different FORC branches determine the asymmetry in the upper and lower lobes of generic bulk FORC diagrams of natural materials with grains predominantly in the vortex state. Multivortex (MV) FORC signatures are modeled here for the first time. MV grains contribute mostly to the transient‐free zone of a FORC diagram, averaging out to create a broad central peak. The intensity of the central peak is higher than that of the lobes, implying that MV particles are more abundant than SV particles in geologic materials with vortex state fingerprints. The abundance of MV particles, as well as their single domain‐like properties point to MV grains being the main natural remanent magnetization carriers in geologic materials.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380011145679099265","@type":"Researcher","foaf:name":[{"@value":"Ioan Lascu"}],"jpcoar:affiliationName":[{"@value":"Department of Mineral Sciences, National Museum of Natural History, Smithsonian Institution  Washington, DC USA"},{"@value":"Department of Earth Sciences University of Cambridge  Cambridge UK"}]},{"@id":"https://cir.nii.ac.jp/crid/1380011145679099264","@type":"Researcher","foaf:name":[{"@value":"Joshua F. Einsle"}],"jpcoar:affiliationName":[{"@value":"Department of Earth Sciences University of Cambridge  Cambridge UK"},{"@value":"Department of Materials Sciences and Metallurgy University of Cambridge  Cambridge UK"}]},{"@id":"https://cir.nii.ac.jp/crid/1380011145679099137","@type":"Researcher","foaf:name":[{"@value":"Matthew R. Ball"}],"jpcoar:affiliationName":[{"@value":"Department of Earth Sciences University of Cambridge  Cambridge UK"}]},{"@id":"https://cir.nii.ac.jp/crid/1380011145679099136","@type":"Researcher","foaf:name":[{"@value":"Richard J. Harrison"}],"jpcoar:affiliationName":[{"@value":"Department of Earth Sciences University of Cambridge  Cambridge UK"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"21699313"},{"@type":"EISSN","@value":"21699356"}],"prism:publicationName":[{"@value":"Journal of Geophysical Research: Solid Earth"}],"dc:publisher":[{"@value":"American Geophysical Union (AGU)"}],"prism:publicationDate":"2018-09","prism:volume":"123","prism:number":"9","prism:startingPage":"7285","prism:endingPage":"7304"},"reviewed":"false","dc:rights":["http://onlinelibrary.wiley.com/termsAndConditions#vor"],"url":[{"@id":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F2018JB015909"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2018JB015909"}],"createdAt":"2018-08-24","modifiedAt":"2023-09-10","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360013168743235456","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Influence of Early Low‐Temperature and Later High‐Temperature Diagenesis on Magnetic Mineral Assemblages in Marine Sediments From the Nankai Trough"}]},{"@id":"https://cir.nii.ac.jp/crid/1360025430649073024","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Obtaining High‐Resolution Magnetic Records From Speleothems Using Magnetic Microscopy"}]},{"@id":"https://cir.nii.ac.jp/crid/1360576118728443648","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Unlocking information about fine magnetic particle assemblages from first-order reversal curve diagrams: Recent advances"}]},{"@id":"https://cir.nii.ac.jp/crid/1360576118729300608","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"A record of the lower Mammoth geomagnetic polarity reversal from a marine succession in the Boso Peninsula, central Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/2050307417125247104","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"High spatial resolution magnetic mapping using ultra-high sensitivity scanning SQUID microscopy on a speleothem from the Kingdom of Tonga, southern Pacific"}]},{"@id":"https://cir.nii.ac.jp/crid/2050870367075044096","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Reductive dissolution of biogenic magnetite"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1029/2018jb015909"},{"@type":"CROSSREF","@value":"10.1029/2021gc010133_references_DOI_vHHFjfGz2YHadbvTHVSAGJQWSU"},{"@type":"CROSSREF","@value":"10.1029/2024gc011594_references_DOI_vHHFjfGz2YHadbvTHVSAGJQWSU"},{"@type":"CROSSREF","@value":"10.1186/s40623-021-01401-8_references_DOI_V8JOjawtNMWLTi4SUptRt6X43dS"},{"@type":"CROSSREF","@value":"10.1016/j.earscirev.2022.103950_references_DOI_vHHFjfGz2YHadbvTHVSAGJQWSU"},{"@type":"CROSSREF","@value":"10.1093/gji/ggab352_references_DOI_vHHFjfGz2YHadbvTHVSAGJQWSU"},{"@type":"CROSSREF","@value":"10.1186/s40623-020-01290-3_references_DOI_vHHFjfGz2YHadbvTHVSAGJQWSU"}]}