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(Color online) Graph of theoretical limitation of as a function of thickness fraction of the magnetostrictive layers, calculated using Eq. (1) and shown as a solid line. Experimental data points are also shown in this investigation using piezofiber/Metglas laminates. Note that unlike the mode, when for the construction, does not tend to zero; rather, it tends to a maximum. This is because for the mode, the polarization is along the length (or longitudinal axis) of the laminate, and thus with decreasing layer thickness the force imposed by a magnetostrictive layer of constant thickness increases.
(Color online) Illustration of our FeBSiC/piezofiber laminate configuration. It consists of a 1D piezoelectric active fiber/epoxy composited (AFC) thin layer where the fibers are oriented along the longitudinal axis, which is laminated between two 2D FeBSiC layers. Insulating Kapton films with interdigitated (ID) electrodes were placed between layers. Each piezofiber had numerous alternating symmetric longitudinally poled “push-pull” units) that were each in length, as shown in the inset.
(Color online) Effective piezomagnetic coefficients as a function of dc magnetic bias for ferromagnetic FeBSiC and Terfenol-D alloys. The inset shows the magnetic flux as a function of the length of the ferromagnetic layer, for both single FeBSiC (cross-sectional area: ) and Terfenol-D layers.
(Color online) Magnetoelectric characterizations of FeBSiC/piezofiber laminates: (a) the ME voltage coefficient as a function of for both short and long laminates; (b) as a function of frequency illustrating a strong enhancement at the electromechanical resonance frequency, where the inset shows a flat response over the quasistatic frequency range; and (c) anisotropy of for applied along the length , width , and thickness of the laminate.
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