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Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2004

Tracking the local reversal processes in nanostructures by magnetic speckles

Résumé

We have used coherent soft x-ray resonant magnetic scattering to locally track reversal processes in magnetic nanostructures. Coherent illumination of a limited number of nano-objects in a CoPt nanoline grating produces a specific speckle pattern, whose evolution under in situ magnetic field reveals the true local magnetic ordering. While each nanoline behaves as a single macrospin whose direction depends on the dipolar coupling with neighbors, the global reversal of the line array is successively governed by two effects: first, by the random distribution of defects, followed by the dipolar coupling favoring antiferromagnetic ordering.
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Dates et versions

hal-00752475 , version 1 (15-11-2012)

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K. Chesnel, M. Belakhovsky, G. van Der Laan, F. Livet, A. Marty, et al.. Tracking the local reversal processes in nanostructures by magnetic speckles. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2004, 70, pp.180402. ⟨10.1103/PHYSREVB.70.180402⟩. ⟨hal-00752475⟩
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