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Título

Anisotropy, hysteresis, and morphology of self-patterned epitaxial Fe/MgO/GaAs films

AutorCebollada, F.; Hernando-Mañeru, A.; Hernando, A.; Martínez Boubeta, C.; Cebollada, Alfonso ; González, J. M.
Fecha de publicación7-nov-2002
EditorAmerican Physical Society
CitaciónPhysical Review B 66, 174410 (2002)
ResumenThe dependence of the effective anisotropy and of the magnetization reversal processes on the deposition temperature of a series of epitaxial Fe/MgO/GaAs films, grown by a combination of laser ablation and sputtering, has been discussed and correlated to their local morphology and crystallinity. The transverse susceptibility measurements have evidenced the presence of a fourfold effective anisotropy for all films, irrespective of their deposition temperature and local morphology, with a constant value very close to that of single-crystalline iron. The magnetization processes evolve with increasing deposition temperature from a nucleation-expansion-propagation mechanism, taking place in smooth continuous films, to pinning, occurring in self-patterned films with homogeneous distributions of defects, and then to fully isotropic reversal, for tiled films composed of rectangular elements.
Versión del editorhttp://dx.doi.org/10.1103/PhysRevB.66.174410
URIhttp://hdl.handle.net/10261/25416
DOI10.1103/PhysRevB.66.174410
ISSN1098-0121
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