Evidence of a barrier oxidation dependence on the interfacial magnetism in Co/alumina based magnetic tunnel junctions

Telling, N. D., Van der Laan, G., Ladak, Sam ORCID: https://orcid.org/0000-0002-0275-0927, Hicken, R. J. and Arenholz, E. 2006. Evidence of a barrier oxidation dependence on the interfacial magnetism in Co/alumina based magnetic tunnel junctions. Journal of Applied Physics 99 (8) , 08E-505. 10.1063/1.2171002

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Abstract

Soft x-ray absorption spectroscopy and magnetic circular dichroism at the Co L2,3 edge have been applied to explore the near-interfacial magnetism of Co electrodes in Co/alumina based magnetic tunnel junctions. By taking into account the formation of CoO at the ferromagnetic (FM)/barrier interface, the change in the total magnetic moment on metallic Co atoms as a function of barrier oxidation has been determined. The results demonstrate a strong correlation between the Co moments and measured TMR values, and an enhancement in the Co moments for moderate oxidation times.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QC Physics
Uncontrolled Keywords:	cobalt, alumina, ferromagnetic materials, electrodes, oxidation, interface magnetism, tunnelling magnetoresistance, X-ray absorption, magnetic circular dichroism, magnetic moments
Additional Information:	PROCEEDINGS OF THE 50TH ANNUAL CONFERENCE ON MAGNETISM AND MAGNETIC MATERIALS / Spin Polarized Tunneling and Interfaces. Pdf uploaded in accordance with publisher's policy at http://www.sherpa.ac.uk/romeo/issn/0021-8979/ (accessed 21/02/2014).
Publisher:	American Institute of Physics
ISSN:	0021-8979
Date of First Compliant Deposit:	30 March 2016
Last Modified:	16 May 2023 07:31
URI:	https://orca.cardiff.ac.uk/id/eprint/35179

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