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Título

Anomalous Hall effect in Fe (001) epitaxial thin films over a wide range in conductivity

AutorSangiao, S. CSIC ORCID; Morellón, Luis CSIC ORCID; Simón, G.; Teresa, José María de CSIC ORCID ; Pardo, J. A. CSIC ORCID; Arbiol, J.; Ibarra, M. Ricardo CSIC ORCID
Palabras claveFerromagnetic materials
Hall effect
Iron
Magnesium compounds
Magnetic epitaxial layers
[PACS] Magnetotransport phenomena; materials for magnetotransport
[PACS] Galvanomagnetic and other magnetotransport effects in thin films
[PACS] Ferromagnetism of Fe and its alloys
Fecha de publicación23-ene-2009
EditorAmerican Physical Society
CitaciónPhysical Review B 79: 014431 (2009)
ResumenWe report Hall-effect measurements of epitaxial Fe (001) thin films grown on MgO (001). We have focused on the dependence of the anomalous Hall effect (AHE) in heteroepitaxial structures MgO (001)//Fe(t)/MgO with t=10, 2.5, 2, 1.8, and 1.3 nm. Our results have been interpreted in terms of a recent unified theory of the AHE. We have demonstrated that the thickness and roughness of the Fe layer are control parameters to tune both the longitudinal conductivity σ(xx) and anomalous Hall conductivity σ(xy). In this way, we report a crossover from the intrinsic moderately dirty region of conductivities where σ(xy) = const to the dirty region of poorly conducting materials (σ(xx) < 10^4 S/cm) where we have found that the relation σ(xy) proportional to σ(xx)^n with n = 1.66(4) holds, in good agreement, with the expected universal scaling relationship reported in other ferromagnetic compounds.
Descripción5 pages, 5 figures.-- PACS nrs.: 75.47.-m; 73.50.Jt; 75.50.Bb.-- ©2009 The American Physical Society.
Versión del editorhttp://dx.doi.org/10.1103/PhysRevB.79.014431
URIhttp://hdl.handle.net/10261/10058
DOI10.1103/PhysRevB.79.014431
ISSN1098-0121
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