Mechanism of magnetization enhancement at CoO/permalloy interfaces

Handle URI:
http://hdl.handle.net/10754/315752
Title:
Mechanism of magnetization enhancement at CoO/permalloy interfaces
Authors:
Grytsyuk, Sergiy; Schwingenschlögl, Udo ( 0000-0003-4179-7231 )
Abstract:
We investigate the magnetic properties of CoO(111)/permalloy(111) interfaces by ab-initio calculations. We employ a (5 × 5)CoO/(6 × 6)permalloy supercell, to satisfy the ∼5:6 ratio of the lattice constants, and optimize the atomic density near the interface. While experimentally the interface magnetization is 14% higher than in the bulk, we find for the purely O/Co-terminated interface a decrease/increase by 140%/40%, which enables insight into the real interface with partial O deficiency and atomic intermixing. Intermixing between Fe and Ni significantly lowers the total energy, which promotes Fe accumulation at the interface. Since Co-O bonds are energetically favorable, O diffusion into the permalloy is suppressed.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Computational Physics and Materials Science (CPMS)
Citation:
Grytsyuk S, Schwingenschlögl U (2013) Mechanism of magnetization enhancement at CoO/permalloy interfaces. Appl Phys Lett 103: 071603. doi:10.1063/1.4818507.
Publisher:
American Institute of Physics
Journal:
Applied Physics Letters
Issue Date:
12-Aug-2013
DOI:
10.1063/1.4818507
Type:
Article
ISSN:
00036951
Additional Links:
http://scitation.aip.org/content/aip/journal/apl/103/7/10.1063/1.4818507
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Computational Physics and Materials Science (CPMS)

Full metadata record

DC FieldValue Language
dc.contributor.authorGrytsyuk, Sergiyen
dc.contributor.authorSchwingenschlögl, Udoen
dc.date.accessioned2014-04-13T12:26:13Z-
dc.date.available2014-04-13T12:26:13Z-
dc.date.issued2013-08-12en
dc.identifier.citationGrytsyuk S, Schwingenschlögl U (2013) Mechanism of magnetization enhancement at CoO/permalloy interfaces. Appl Phys Lett 103: 071603. doi:10.1063/1.4818507.en
dc.identifier.issn00036951en
dc.identifier.doi10.1063/1.4818507en
dc.identifier.urihttp://hdl.handle.net/10754/315752en
dc.description.abstractWe investigate the magnetic properties of CoO(111)/permalloy(111) interfaces by ab-initio calculations. We employ a (5 × 5)CoO/(6 × 6)permalloy supercell, to satisfy the ∼5:6 ratio of the lattice constants, and optimize the atomic density near the interface. While experimentally the interface magnetization is 14% higher than in the bulk, we find for the purely O/Co-terminated interface a decrease/increase by 140%/40%, which enables insight into the real interface with partial O deficiency and atomic intermixing. Intermixing between Fe and Ni significantly lowers the total energy, which promotes Fe accumulation at the interface. Since Co-O bonds are energetically favorable, O diffusion into the permalloy is suppressed.en
dc.language.isoenen
dc.publisherAmerican Institute of Physicsen
dc.relation.urlhttp://scitation.aip.org/content/aip/journal/apl/103/7/10.1063/1.4818507en
dc.rightsArchived with thanks to Applied Physics Lettersen
dc.titleMechanism of magnetization enhancement at CoO/permalloy interfacesen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentComputational Physics and Materials Science (CPMS)en
dc.identifier.journalApplied Physics Lettersen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionDepartment of Materials, Imperial College London, London SW7 2BP, United Kingdomen
dc.contributor.institutionMaterials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545, United Statesen
dc.contributor.institutionInstitute of Material Physics, University of Münster, Wilhelm-Klemm-Straße 10, D-48149 Münster, Germanyen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorSchwingenschlögl, Udoen
kaust.authorGrytsyuk, Sergiyen
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