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Open Access item Nanopatterning effects on magnetic anisotropy of epitaxial Fe(001) micrometric squares

Authors:Jaque, Daniel
Martín, J. I.
Armelles Reig, Gaspar
Costa Krämer, José Luis
Briones Fernández-Pola, Fernando
Vicent, J. L.
Keywords:Iron, Magnetic epitaxial layers, Magnetic anisotropy, Magneto-optical effects, Nanotechnology, Magnetic hysteresis, Lithography
Issue Date:1-Jan-2002
Publisher:American Institute of Physics
Citation:Journal of Applied Physics 91, 382 (2002)
Abstract:Magneto-optic (MO) studies are performed on regular arrays of Fe(100) micrometric squares, where the elements are patterned with different sizes (2.5–10 μm) and separations (0.2–0.6 μm). When a laser beam is focused inside the patterned structure a Bragg diffraction pattern is produced allowing MO studies on both reflected and diffracted spots. The magnetic anisotropy has been analyzed by in-plane MO hysteresis loops finding that, for square sizes below 2.5 μm, it is not consistent with the Fe crystalline cubic anisotropy, presenting a uniaxial-like behavior. The magnitude of the corresponding anisotropy constants has been determined by analyzing the array response (on reflected and diffracted spots) to a rotational magnetic field in a magneto-optical torque setup. For square sizes of 10 μm the anisotropy induced by patterning is negligible whereas for the small squares (2.5 μm) the uniaxial magnetic constant has been found to be roughly 0.2 times the Fe cubic anisotropy constant.
Publisher version (URL):http://dx.doi.org/10.1063/1.1421042
Appears in Collections:(IMM-CNM) Artículos

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