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Closed Access item Magnetization reversal asymmetry in Fe/MgO (001) thin films

Authors:Costa Krämer, José Luis
Menéndez, José Luis
Cebollada, Alfonso
Briones Fernández-Pola, Fernando
García, D.
Hernando, A.
Keywords:Thin films, Anisotropy, Fe, Domains, Sputtering
Issue Date:Feb-2000
Publisher:Elsevier
Citation:Journal of Magnetism and Magnetic Materials 210(1-3): 341-348 (2000)
Abstract:We study the in-plane magnetization process in 200 Å Fe(0 0 1) thin films grown by sputtering at normal incidence. In spite of this growth geometry, a small uniaxial in plane magnetic anisotropy, whose origin is not totally understood, is found superimposed to the expected cubic biaxial one. This has a dramatic effect both on the reversal process and the domain structure. A combined longitudinal and transversal Kerr study shows the different switching processes (180° walls along the main easy axis versus 90° along the secondary easy axis) depending on the relative orientation of the magnetic field with respect to the Fe crystallographic axes. Remarkably, this two- and sometimes three-step switching process appears only when the field is applied along certain crystallographic directions. These findings are corroborated by domain observations.
Publisher version (URL):http://dx.doi.org/10.1016/S0304-8853(99)00698-8
URI:http://hdl.handle.net/10261/34935
ISSN:0304-8853
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