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Vortex State Suppression in a Hexagonal Array of Interacting Py Triangular Rings

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Spizzo F., Patrignani L., Bisero D., Vavassori P., Metlushko V.
Acta Physica Polonica A
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2013
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vol. 123
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issue 2
218-220
EN
We investigate the effect of magnetostatic interactions on the magnetization reversal process of equilateral triangular rings arranged on a hexagonal lattice. Inter-ring interactions originate as rings corners host domain-walls that produce an intense dipolar field; the effect of such interactions is studied by recording hysteresis loops for different magnetic field orientations. Rings magnetic configuration is probed via magnetic force microscopy and diffraction magneto-optic Kerr effect measurements. We observe that the effect of stray fields due to domain-walls competes with that of shape anisotropy, and that the former prevails when the magnetic field orientation is parallel to rings symmetry axes.
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