Magnetization reversal in patterned Co(0001) ultrathin films with perpendicular magnetic anisotropy

Using x-ray lithography we have patterned dot arrays in Au/Co/Au(111) sandwiches based on ultrathin Co layers with perpendicular anisotropy. Large area arrays of dots with diameters of 1 and 2 μm have been obtained, keeping mostly undamaged the ultrathin Co layer. Hysteresis loops of the arrays depe...

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Veröffentlicht in:Journal of applied physics 1996-04, Vol.79 (8), p.5848-5850
Hauptverfasser: Bardou, N., Bartenlian, B., Chappert, C., Mégy, R., Veillet, P., Renard, J. P., Rousseaux, F., Ravet, M. F., Jamet, J. P., Meyer, P.
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Sprache:eng
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Zusammenfassung:Using x-ray lithography we have patterned dot arrays in Au/Co/Au(111) sandwiches based on ultrathin Co layers with perpendicular anisotropy. Large area arrays of dots with diameters of 1 and 2 μm have been obtained, keeping mostly undamaged the ultrathin Co layer. Hysteresis loops of the arrays depend drastically on the dot diameter. Magneto-optical domain visualization experiments confirm a magnetization reversal mechanism based on a large distribution of nucleation fields in the film, with complete reversal of the magnetization of one dot through the domain wall propagation after a local nucleation process. This could give information on the magnetization reversal processes in Au/Co/Au(111) continuous films.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.362145