Neil Telling n.d.telling@keele.ac.uk
Spin polarization and barrier-oxidation effects at the Co∕alumina interface in magnetic tunnel junctions
Telling, N. D.; van der Laan, G.; Ladak, S.; Hicken, R. J.
Authors
G. van der Laan
S. Ladak
R. J. Hicken
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
absorption edges. It was found that the
electronic structure near the
∕alumina interface tended to that of cobalt oxide as the barrier oxidation time was increased. However, the net
spin polarization, determined from x-ray magnetic circular dichroism, increased for moderate oxidation times compared to that obtained for an under-oxidized
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
spin-polarization of the interface layer as the interface bonding changes from
to
with increasing oxidation times.
Citation
Telling, N. D., van der Laan, G., Ladak, S., & Hicken, R. J. (2004). Spin polarization and barrier-oxidation effects at the Co∕alumina interface in magnetic tunnel junctions. Applied Physics Letters, 85(17), 3803-3805. https://doi.org/10.1063/1.1812383
Journal Article Type | Article |
---|---|
Online Publication Date | Oct 25, 2004 |
Publication Date | Oct 25, 2004 |
Deposit Date | May 17, 2024 |
Journal | Applied Physics Letters |
Print ISSN | 0003-6951 |
Electronic ISSN | 1077-3118 |
Publisher | AIP Publishing |
Peer Reviewed | Peer Reviewed |
Volume | 85 |
Issue | 17 |
Pages | 3803-3805 |
DOI | https://doi.org/10.1063/1.1812383 |
Public URL | https://keele-repository.worktribe.com/output/828969 |
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