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dc.contributor.authorTelling, N.D.en_GB
dc.contributor.authorvan der Laan, Gerriten_GB
dc.contributor.authorLadak, S.en_GB
dc.contributor.authorHicken, R.J.en_GB
dc.date.accessioned2013-01-17T16:40:36Zen_GB
dc.date.accessioned2013-03-20T13:11:23Z
dc.date.issued2004en_GB
dc.description.abstractThe electronic structure and polarization in magnetic tunnel junctions prepared with varying degrees of barrier-layer oxidation have been studied using x-ray absorption spectroscopy across the Co L2,3 absorption edges. It was found that the Co electronic structure near the Co∕alumina interface tended to that of cobalt oxide as the barrier oxidation time was increased. However, the net Co 3d spin polarization, determined from x-ray magnetic circular dichroism, increased for moderate oxidation times compared to that obtained for an under-oxidized Co∕Al interface. It is proposed that the expected dilution of the measured polarization due to the formation of (room temperature) paramagnetic cobalt oxide, is offset by an increase in the Co 3d spin-polarization of the interface layer as the interface bonding changes from Co–Al to Co–O with increasing oxidation times.en_GB
dc.identifier.citationVol. 85 (17), pp. 3803 - 3805en_GB
dc.identifier.doi10.1063/1.1812383en_GB
dc.identifier.urihttp://hdl.handle.net/10036/4169en_GB
dc.language.isoenen_GB
dc.publisherAmerican Institute of Physicsen_GB
dc.relation.urlhttp://dx.doi.org/10.1063/1.1812383en_GB
dc.subjectcobalten_GB
dc.subjectaluminaen_GB
dc.subjectparamagnetic materialsen_GB
dc.subjectmagnetic tunnellingen_GB
dc.subjectoxidationen_GB
dc.subjectelectron spin polarisationen_GB
dc.subjectband structureen_GB
dc.subjectmagnetic circular dichroismen_GB
dc.subjectbonds (chemical)en_GB
dc.subjectX-ray absorption spectraen_GB
dc.subjectmagnetic structureen_GB
dc.titleSpin polarization and barrier oxidation effects at the Co/alumina interface in magnetic tunnel junctionsen_GB
dc.typeArticleen_GB
dc.date.available2013-01-17T16:40:36Zen_GB
dc.date.available2013-03-20T13:11:23Z
dc.identifier.issn0003-6951en_GB
dc.descriptionCopyright © 2004 American Institute of Physicsen_GB
dc.identifier.eissn1077-3118en_GB
dc.identifier.journalApplied Physics Lettersen_GB


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