dc.contributor.author | Telling, N.D. | en_GB |
dc.contributor.author | van der Laan, Gerrit | en_GB |
dc.contributor.author | Ladak, S. | en_GB |
dc.contributor.author | Hicken, R.J. | en_GB |
dc.date.accessioned | 2013-01-17T16:40:36Z | en_GB |
dc.date.accessioned | 2013-03-20T13:11:23Z | |
dc.date.issued | 2004 | en_GB |
dc.description.abstract | The 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.citation | Vol. 85 (17), pp. 3803 - 3805 | en_GB |
dc.identifier.doi | 10.1063/1.1812383 | en_GB |
dc.identifier.uri | http://hdl.handle.net/10036/4169 | en_GB |
dc.language.iso | en | en_GB |
dc.publisher | American Institute of Physics | en_GB |
dc.relation.url | http://dx.doi.org/10.1063/1.1812383 | en_GB |
dc.subject | cobalt | en_GB |
dc.subject | alumina | en_GB |
dc.subject | paramagnetic materials | en_GB |
dc.subject | magnetic tunnelling | en_GB |
dc.subject | oxidation | en_GB |
dc.subject | electron spin polarisation | en_GB |
dc.subject | band structure | en_GB |
dc.subject | magnetic circular dichroism | en_GB |
dc.subject | bonds (chemical) | en_GB |
dc.subject | X-ray absorption spectra | en_GB |
dc.subject | magnetic structure | en_GB |
dc.title | Spin polarization and barrier oxidation effects at the Co/alumina interface in magnetic tunnel junctions | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2013-01-17T16:40:36Z | en_GB |
dc.date.available | 2013-03-20T13:11:23Z | |
dc.identifier.issn | 0003-6951 | en_GB |
dc.description | Copyright © 2004 American Institute of Physics | en_GB |
dc.identifier.eissn | 1077-3118 | en_GB |
dc.identifier.journal | Applied Physics Letters | en_GB |