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- W3020221483 abstract "Magnetic wires in highly dense arrays, possessing unique magnetic properties, are eagerly anticipated for inexpensive and scalable fabrication technologies. This study reports a facile method to fabricate arrays of magnetic wires directly assembled from well-dispersed α ″ -Fe 16 N 2 /Al 2 O 3 and Fe 3 O 4 nanoparticles with average diameters of 45 nm and 65 nm, respectively. The magnetic arrays with a height scale of the order of 10 mm were formed on substrate surfaces, which were perpendicular to an applied magnetic field of 15 T. The applied magnetic field aligned the easy axis of the magnetic nanoparticles (MNPs) and resulted in a significant enhancement of the magnetic performance. Hysteresis curves reveal that values of magnetic coercivity and remanent magnetization in the preferred magnetization direction are both higher than that of the nanoparticles, while these values in the perpendicular direction are both lower. Enhancement in the magnetic property for arrays made from spindle-shape α ″ -Fe 16 N 2 /Al 2 O 3 nanoparticles is higher than that made from cube-like α ″ -Fe 16 N 2 /Al 2 O 3 ones, owing to the shape anisotropy of MNPs. Furthermore, the assembled highly magnetic α ″ -Fe 16 N 2 /Al 2 O 3 arrays produced a detectable magnetic field with an intensity of approximately 0.2 T. Although high-intensity external field benefits for the fabrication of magnetic arrays, the newly developed technique provides an environmentally friendly and feasible approach to fabricate magnetic wires in highly dense arrays in open environment condition." @default.
- W3020221483 created "2020-05-01" @default.
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- W3020221483 date "2020-04-01" @default.
- W3020221483 modified "2023-10-16" @default.
- W3020221483 title "Enhanced magnetic performance of aligned wires assembled from nanoparticles: from nanoscale to macroscale" @default.
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- W3020221483 doi "https://doi.org/10.1098/rsos.191656" @default.
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