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Suppression of 90° spin switching in Co nanomagnets grown on the Cu(110)-{2×1}O surface

Tselepi, M., Bode, P.J., Xu, Y.B., Wastlbauer, G., Hope, S. and Bland, J.A.C. (2001) Suppression of 90° spin switching in Co nanomagnets grown on the Cu(110)-{2×1}O surface. Journal of Applied Physics, 89 (11). pp. 6683-6685. ISSN 1089-7550

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We report on the effect of oxygen on the CO-induced 90° spin switching in the Co/Cu(110) system [Hope et al., Phys. Rev. B 57, 7454 (1998)]. The epitaxial fcc Co films were grown on the unsaturated Cu(110)-{2×1}O surface and their magnetic properties have been studied with in situ magneto-optic Kerr effect. The easy axis switch of the Co(110) films is suppressed when Co is grown on O exposed Cu surfaces. Scanning tunneling microscopy images of the film surface reveals the growth of elongated nanostructures preferentially oriented along the [001] direction, providing step-like edges for gas adsorption. The density of steps is similar to the density developing during growth on the clean Cu(110) surface but the step edges now run in the perpendicular direction. The suppression of the easy axis switch can be attributed to subtle changes of the number and adsorption probability of the available atop adsorption sites along the step edges for CO chemisorption. Our experiments highlight the remarkable chemical sensitivity and adsorption site dependence of the easy axis switch of the Co(110) nanomagnets. © 2001 American Institute of Physics.

Item Type: Article
Copyright, Publisher and Additional Information: © 2001 American Institute of Physics. Available from the author's web site (Associated URL field).
Institution: The University of York
Academic Units: The University of York > Electronics (York)
Depositing User: Repository Officer
Date Deposited: 08 Jan 2007
Last Modified: 05 Aug 2007 18:25
Published Version: http://dx.doi.org/10.1063/1.1360259
Status: Published
Publisher: American Institute of Physics
Refereed: Yes
Identification Number: 10.1063/1.1360259
Related URLs:
URI: http://eprints.whiterose.ac.uk/id/eprint/1888

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