{"@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/1364233270901640320.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1029/2005gl024196"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F2005GL024196"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2005GL024196"}}],"dc:title":[{"@value":"Non‐saturation of the defect moment of goethite and fine‐grained hematite up to 57 Teslas"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:p>Defect moment of antiferromagnets yields the highest remanent coercivity observed among minerals, and previous studies have been unable to reach saturation of isothermal remanent magnetization (IRM) in some goethite and hematite, even up to 20 Teslas, using resistive Bitter magnets. To go further, acquisition of IRM at room temperature has been monitored on various natural and synthetic goethite and hematite samples in pulsed magnetic fields up to 57 Teslas. “Coarse” hematite is saturated around 5 T, and low unblocking temperature (T<jats:sub>B</jats:sub>, i.e. with low crystallinity or Al substitution) goethites saturate around 20 T. Higher T<jats:sub>B</jats:sub> goethites and a Mn‐bearing fine‐grained hematite are still not saturated even at 57 T, with only 2 to 10 percent of the maximum IRM acquired in 3 T. Half acquisition fields are mostly above 10 T. This indicates that usual rock magnetic techniques strongly underestimate the contribution of such minerals to remanence. IRM acquisition is strongly irreversible: in some samples a 57 T backfield is unable to erase a previous 38 T IRM. A field induced defect diffusion model is put forward to account for remanence acquisition in these materials.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1384233270901640320","@type":"Researcher","foaf:name":[{"@value":"Pierre Rochette"}],"jpcoar:affiliationName":[{"@value":"CEREGE University of Aix‐Marseille 3  Aix en Provence France"}]},{"@id":"https://cir.nii.ac.jp/crid/1380298342244116993","@type":"Researcher","foaf:name":[{"@value":"Pierre‐Etienne Mathé"}],"jpcoar:affiliationName":[{"@value":"CEREGE University of Aix‐Marseille 3  Aix en Provence France"}]},{"@id":"https://cir.nii.ac.jp/crid/1384233270901640321","@type":"Researcher","foaf:name":[{"@value":"Lionel Esteban"}],"jpcoar:affiliationName":[{"@value":"Laboratoire des Mécanismes de Transferts en Géologie Université de Toulouse  Toulouse France"}]},{"@id":"https://cir.nii.ac.jp/crid/1384233270901640449","@type":"Researcher","foaf:name":[{"@value":"Harison Rakoto"}],"jpcoar:affiliationName":[{"@value":"Laboratoire National des Champs Magnétiques Pulsés  Toulouse France"}]},{"@id":"https://cir.nii.ac.jp/crid/1380298342244116992","@type":"Researcher","foaf:name":[{"@value":"Jean‐Luc Bouchez"}],"jpcoar:affiliationName":[{"@value":"Laboratoire des Mécanismes de Transferts en Géologie Université de Toulouse  Toulouse France"}]},{"@id":"https://cir.nii.ac.jp/crid/1384233270901640450","@type":"Researcher","foaf:name":[{"@value":"Qingsong Liu"}],"jpcoar:affiliationName":[{"@value":"Institute of Geophysics and Planetary Physics University of California  Santa Cruz California USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1384233270901640448","@type":"Researcher","foaf:name":[{"@value":"José Torrent"}],"jpcoar:affiliationName":[{"@value":"Departamento de Ciencias y Recursos Agrícolas y Forestales Universidad de Córdoba  Córdoba Spain"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00948276"},{"@type":"EISSN","@value":"19448007"}],"prism:publicationName":[{"@value":"Geophysical Research Letters"}],"dc:publisher":[{"@value":"American Geophysical Union (AGU)"}],"prism:publicationDate":"2005-11","prism:volume":"32","prism:number":"22","prism:startingPage":"L22309"},"reviewed":"false","dc:rights":["http://onlinelibrary.wiley.com/termsAndConditions#vor"],"url":[{"@id":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F2005GL024196"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2005GL024196"}],"createdAt":"2005-11-22","modifiedAt":"2023-10-31","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360283691086625152","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Impact of climate change on the magnetic mineral assemblage in marine sediments from Izu rear arc, NW Pacific Ocean, over the last 1 Myr"}]},{"@id":"https://cir.nii.ac.jp/crid/1360285704778472704","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Authigenesis of magnetic minerals in gas hydrate-bearing sediments in the Nankai Trough, offshore Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/2050588892089886720","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Pliocene integrated chronostratigraphy from the Anno Formation, Awa Group, Boso Peninsula, central Japan, and its paleoceanographic implications"}]},{"@id":"https://cir.nii.ac.jp/crid/2050870367119583232","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Characterizing magnetic mineral assemblages of surface sediments from major Asian dust sources and implications for the Chinese loess magnetism"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1029/2005gl024196"},{"@type":"CROSSREF","@value":"10.1186/s40623-015-0237-8_references_DOI_SlKVoRT59oK9GdATd5Y4p9FRoak"},{"@type":"CROSSREF","@value":"10.1002/2014gc005614_references_DOI_SlKVoRT59oK9GdATd5Y4p9FRoak"},{"@type":"CROSSREF","@value":"10.1186/s40645-018-0248-8_references_DOI_SlKVoRT59oK9GdATd5Y4p9FRoak"},{"@type":"CROSSREF","@value":"10.1016/j.palaeo.2017.05.016_references_DOI_SlKVoRT59oK9GdATd5Y4p9FRoak"}]}