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Giant anomalous Hall effect in Fe-based microwires grown by focused-electron-beam-induced deposition

AuthorsCórdoba, R.; Lavrijsen, R.; Fernández-Pacheco, Amalio; Ibarra, M. Ricardo; Schoenaker, F. J.; Teresa, José María de
Issue Date2012
PublisherInstitute of Physics Publishing
CitationJournal of Physics D: Applied Physics 45(3): 035001 (2012)
AbstractWe report the temperature dependence of the resistivity, the anisotropic magnetoresistance and the Hall effect of iron microwires grown by focused-electron-beam-induced deposition. By modifying the growth conditions in a controllable way, we study wires with iron compositions varying from 45% to 70%, which present different electrical conduction mechanisms, with resistivity values differing over three orders of magnitude. The magnetoresistance depends highly on the composition, and it can be understood by a subtle interplay between the anisotropic magnetoresistance and intergrain magnetoresistance due to their complex microstructure, consisting of an ironcarbonoxygen amorphous matrix. A giant value for the anomalous Hall effect is found, which we explain by a large contribution of the skew scattering mechanism. The present results emphasize the correlation between the exotic microstructure of the microwires, and their magnetotransport properties. © 2012 IOP Publishing Ltd.
Identifiersdoi: 10.1088/0022-3727/45/3/035001
issn: 0022-3727
e-issn: 1361-6463
Appears in Collections:(ICMA) Artículos
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