title: Intercalation-driven reversible control of magnetism in bulk ferromagnets.
abstract: An extension in magnetoelectric effects is proposed to include reversible chemistry-controlled magnetization variations. This ion-intercalation-driven magnetic control can be fully reversible and pertinent to bulk material volumes. The concept is demonstrated for ferromagnetic iron oxide where the intercalated lithium ions cause valence change and partial redistribution of Fe(3+) cations yielding a large and fully reversible change in magnetization at room temperature.
authors.affiliation: Institute for Nanotechnology, Karlsruhe Institute of Technology (KIT), D-76344, Eggenstein-Leopoldshafen, Germany.
authors.forename: Subho
authors.initials: S
authors.lastname: Dasgupta
authors.forename: Bijoy
authors.initials: B
authors.lastname: Das
authors.forename: Michael
authors.initials: M
authors.lastname: Knapp
authors.forename: Richard A
authors.initials: RA
authors.lastname: Brand
authors.forename: Helmut
authors.initials: H
authors.lastname: Ehrenberg
authors.forename: Robert
authors.initials: R
authors.lastname: Kruk
authors.forename: Horst
authors.initials: H
authors.lastname: Hahn
mesh_terms: D005290:Ferric Compounds / Q000737:chemistry; D060328:Magnetic Phenomena; D059346:Magnets / Q000737:chemistry*; D015204:Spectroscopy, Mossbauer; D013329:Structure-Activity Relationship
chemical_list: D005290:Ferric Compounds; C000499:ferric oxide
keywords: Bulk magnetism; Ferromagnetism; Intercalation; Magnetoelectric effects; Reversible Li-chemistry; Spinel ferrite