SEM top view image of the template (inset) and SEM cross-sectional view of FeCoCu nanowires with 18 nm in diameter, interwire distance of 55 nm, and around 8 μm in length (a). XRD spectra of the sample in its as prepared state and after annealing at 500 °C (b).
(a) Experimental (filled symbols) RT evolution of coercivity with the annealing temperature for FeCoCu nanowires of indicated diameter, Dw, and corresponding simulations for a single nanowire (lines) and for an array of 7 nanowires (dashed line). Experimental hysteresis loops for the 18 nm diameter FeCoCu nanowires array in as-prepared (b) and after annealing at 500 °C (c) states, where insets (upper left sides) show 3D images of the simulated magnetization distribution in respective vortex (b) and transverse (c) domain wall (see text). The insets in right sides show the magnetic moment configuration of vortex (b) and transverse (c) domain wall in nanowire cross-section.
Coercivity, measured parallel to the nanowires, versus measuring temperature, in as-prepared and annealed sample.
Simulated coercivity data for individual nanowires as a function of their diameters (a), and experimental data for coercivity (filled symbols) and squareness (open symbols) as a function of diameters for as-deposited nanowire arrays (b).
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