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Title

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

AuthorsJaque, Daniel; Martín, José Ignacio CSIC ORCID; Armelles Reig, Gaspar CSIC ORCID; Costa Krämer, José Luis CSIC ORCID ; Briones Fernández-Pola, Fernando; Vicent, J. L.
KeywordsIron
Magnetic epitaxial layers
Magnetic anisotropy
Magneto-optical effects
Nanotechnology
Magnetic hysteresis
Lithography
Issue Date1-Jan-2002
PublisherAmerican Institute of Physics
CitationJournal of Applied Physics 91, 382 (2002)
AbstractMagneto-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
URIhttp://hdl.handle.net/10261/25368
DOI10.1063/1.1421042
ISSN0021-8979
Appears in Collections:(IMN-CNM) Artículos

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