Arrays of single-crystal Fe micron and submicron squares and disks, have been fabricated using a focused ion beam apparatus from a film epitaxially grown on MgO. The hysteresis loops of the patterned areas differ from those of the continuous film as a consequence of the different reversal determined by the lateral confinement of the Fe film. By means of modulated field magneto-optical anisometry measurements we studied the symmetry and the strength of the overall anisotropy. For the smaller square elements we observed a higher-order term in the overall anisotropy with eightfold symmetry arising from the configurational contribution. 2004 Elsevier B.V. All rights reserved
Magnetocrystalline and configurational anisotropies in Fe nanostructures / P., Vavassori; D., Bisero; F., Carace; Liberati, Marco; A., di Bona; Valeri, Sergio; G. C., Gazzadi. - In: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS. - ISSN 0304-8853. - STAMPA. - 290-291:(2005), pp. 183-186. [10.1016/j.jmmm.2004.11.177]
Magnetocrystalline and configurational anisotropies in Fe nanostructures
LIBERATI, Marco;VALERI, Sergio;
2005
Abstract
Arrays of single-crystal Fe micron and submicron squares and disks, have been fabricated using a focused ion beam apparatus from a film epitaxially grown on MgO. The hysteresis loops of the patterned areas differ from those of the continuous film as a consequence of the different reversal determined by the lateral confinement of the Fe film. By means of modulated field magneto-optical anisometry measurements we studied the symmetry and the strength of the overall anisotropy. For the smaller square elements we observed a higher-order term in the overall anisotropy with eightfold symmetry arising from the configurational contribution. 2004 Elsevier B.V. All rights reserved
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