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Title:
Nanopatterning effects on magnetic anisotropy of epitaxial Fe(001) micrometric squares
Authors:
Jaque, D.; Martín, J. I.; Armelles, G.; Costa-Krämer, J. L.; Briones, F.; Vicent, J. L.
Affiliation:
AA(Departamento de Física de Materiales, CC. Físicas, Universidad Complutense, Av. Complutense, 28040 Madrid, Spain), AB(Departamento de Física, Facultad de Ciencias, Universidad de Oviedo, 33007 Oviedo, Spain), AC(Instituto de Microelectrónica de Madrid, CNM, CSIC, Isaac Newton 8, PTM Tres Cantos, 28760 Madrid, Spain), AD(Instituto de Microelectrónica de Madrid, CNM, CSIC, Isaac Newton 8, PTM Tres Cantos, 28760 Madrid, Spain), AE(Instituto de Microelectrónica de Madrid, CNM, CSIC, Isaac Newton 8, PTM Tres Cantos, 28760 Madrid, Spain), AF(Departamento de Física de Materiales, CC. Físicas, Universidad Complutense, Av. Complutense, 28040 Madrid, Spain)
Publication:
Journal of Applied Physics, Volume 91, Issue 1, pp. 382-388 (2002). (JAP Homepage)
Publication Date:
01/2002
Origin:
AIP
Keywords:
iron, magnetic epitaxial layers, magnetic anisotropy, magneto-optical effects, nanotechnology, magnetic hysteresis, lithography
Abstract Copyright:
(c) 2002: American Institute of Physics
DOI:
10.1063/1.1421042
Bibliographic Code:
2002JAP....91..382J

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. © 2002 American Institute of Physics.
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