Sign change in the tunnel magnetoresistance of Fe3O4/MgO/Co-Fe-B magnetic tunnel junctions depending on the annealing temperature and the interface treatment

DC FieldValueLanguage
dc.contributor.authorMarnitz, L.
dc.contributor.authorRott, K.
dc.contributor.authorNiehoerster, S.
dc.contributor.authorKlewe, C.
dc.contributor.authorMeier, D.
dc.contributor.authorFabretti, S.
dc.contributor.authorWitziok, M.
dc.contributor.authorKrampf, A.
dc.contributor.authorKuschel, O.
dc.contributor.authorSchemme, T.
dc.contributor.authorKuepper, K.
dc.contributor.authorWollschlaeger, J.
dc.contributor.authorThomas, A.
dc.contributor.authorReiss, G.
dc.contributor.authorKuschel, T.
dc.date.accessioned2021-12-23T16:11:01Z-
dc.date.available2021-12-23T16:11:01Z-
dc.date.issued2015
dc.identifier.issn21583226
dc.identifier.urihttps://osnascholar.ub.uni-osnabrueck.de/handle/unios/9493-
dc.description.abstractMagnetite (Fe3O4) is an eligible candidate for magnetic tunnel junctions (MTJs) since it shows a high spin polarization at the Fermi level as well as a high Curie temperature of 585 degrees C. In this study, Fe3O4/MgO/Co-Fe-B MTJs were manufactured. A sign change in the TMR is observed after annealing the MTJs at temperatures between 200 degrees C and 280 degrees C. Our findings suggest an Mg interdiffusion from the MgO barrier into the Fe3O4 as the reason for the change of the TMR. Additionally, different treatments of the magnetite interface (argon bombardment, annealing at 200 degrees C in oxygen atmosphere) during the preparation of the MTJs have been studied regarding their effect on the performance of the MTJs. A maximum TMR of up to -12% could be observed using both argon bombardment and annealing in oxygen atmosphere, despite exposing the magnetite surface to atmospheric conditions before the deposition of the MgO barrier. (C) 2015 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.
dc.description.sponsorshipMinistry of Innovation, Science and Research (MIWF) of North Rhine-Westphalia; Deutsche ForschungsgemeinschaftGerman Research Foundation (DFG); Bielefeld University; DFGGerman Research Foundation (DFG)European Commission [KU2321/2-1, RE1052/32-1]; S.F., A.T. and T.K. were funded by the Ministry of Innovation, Science and Research (MIWF) of North Rhine-Westphalia through an independent researcher grant. We acknowledge support for the Article Processing Charge by the Deutsche Forschungsgemeinschaft and the Open Access Publication Fund of Bielefeld University. K.K. and G.R. acknowledge further support by the DFG (KU2321/2-1 and RE1052/32-1).
dc.language.isoen
dc.publisherAMER INST PHYSICS
dc.relation.ispartofAIP ADVANCES
dc.subjectELECTRODE
dc.subjectEPITAXY
dc.subjectFABRICATION
dc.subjectFE3O4
dc.subjectMAGNESIUM-OXIDE 001
dc.subjectMaterials Science
dc.subjectMaterials Science, Multidisciplinary
dc.subjectNanoscience & Nanotechnology
dc.subjectPhysics
dc.subjectPhysics, Applied
dc.subjectROOM-TEMPERATURE
dc.subjectScience & Technology - Other Topics
dc.subjectSURFACE-STRUCTURE
dc.subjectTHIN-FILMS
dc.titleSign change in the tunnel magnetoresistance of Fe3O4/MgO/Co-Fe-B magnetic tunnel junctions depending on the annealing temperature and the interface treatment
dc.typejournal article
dc.identifier.doi10.1063/1.4917018
dc.identifier.isiISI:000353827700036
dc.description.volume5
dc.description.issue4
dc.contributor.orcid0000-0001-8594-9060
dc.contributor.orcid0000-0002-0918-5940
dc.contributor.orcid0000-0002-9371-8876
dc.contributor.orcid0000-0001-5790-9379
dc.contributor.researcheridG-1397-2016
dc.contributor.researcheridC-7210-2008
dc.contributor.researcheridA-3423-2010
dc.contributor.researcheridB-5747-2013
dc.publisher.place1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
dcterms.isPartOf.abbreviationAIP Adv.
dcterms.oaStatusgold, Green Published, Green Submitted
crisitem.author.deptFB 04 - Physik-
crisitem.author.deptidfb04-
crisitem.author.orcid0000-0002-9371-8876-
crisitem.author.parentorgUniversität Osnabrück-
crisitem.author.netidScTo645-
crisitem.author.netidKuTi001-
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