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dc.contributor.authorQuirós, Carlos-
dc.contributor.authorDíaz, Javier-
dc.contributor.authorAlija, Alejandro-
dc.contributor.authorBlanco-Roldán, C.-
dc.contributor.authorVélez, María-
dc.contributor.authorAlameda, J. M.-
dc.identifierdoi: 10.1088/0957-4484/25/33/335704-
dc.identifierissn: 0957-4484-
dc.identifiere-issn: 1361-6528-
dc.identifier.citationNanotechnology 25(33): 335704 (2014)-
dc.descriptionet al.-
dc.description.abstractStrong asymmetries have been observed in grazing incidence small angle x-ray scattering (GISAXS) in situ patterns obtained from 30 nm-thick nanocrystalline Co films prepared by oblique sputtering (15°-75° off-sample normal). These asymmetries have been qualitatively simulated by a simple model consisting of an ensemble of 8 nm-wide inclined Co nanocolumns. It is found that narrow inclined features appear in the diffuse background resembling those characteristic of faceted systems, which can be used to obtain straightforward non-destructive estimations of buried nanocolumnar grains inclination, even for oblique angles below 45°, when the stronger and broader asymmetric features of the pattern are not yet fully formed. Furthermore, using magneto-optical microscopy, a marked change in the magnetic domain's nucleation and growth process has been observed in the sample prepared at 75°, with the stronger GISAXS asymmetries. Easy axis magnetization reversal starts by a random and homogeneous nucleation of small (∼μm) elongated domains aligned with the nanocolumn's long axis and proceeds through the preferred propagation of head-to-head domain walls (DWs) along the applied field direction. This peculiar magnetic behavior indicates that the strongly anisotropic nanostructuring created by the oblique growth process is equivalent, from a magnetic point of view, to an array of self-assembled buried nanowires. These results show how GISAXS and magneto-optical microscopy can be combined as a powerful tool for correlating the morphology and magnetism of thin nanostructured systems. © 2014 IOP Publishing Ltd.-
dc.description.sponsorshipWork supported by the Spanish MICINN FIS2008-06249 grant. Support by the BM05 beamline technical staff and from ESRF funding are greatly acknowledged.-
dc.publisherInstitute of Physics Publishing-
dc.titleAsymmetric grazing incidence small angle x-ray scattering and anisotropic domain wall motion in obliquely grown nanocrystalline Co films-
dc.description.versionPeer Reviewed-
dc.contributor.funderMinisterio de Ciencia e Innovación (España)-
dc.contributor.funderEuropean Commission-
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