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Printable Hierarchical Nickel Nanowires for Soft Magnetic Applications
journal contribution
posted on 2018-10-26, 17:56 authored by Aiswarya Remadevi, Dijith Kesavapillai Sreedeviamma, Kuzhichalil P. SurendranHierarchical
nickel nanowires (h-NiNWs) were synthesized by a simple
reduction method and their electrical, magnetic, and electromagnetic
characteristics were investigated. These nanowires possess a high
magnetic saturation (Ms) of 51 emu/g and
also a coercivity (Hc) of 34.5 Oe, which
makes them suitable for soft magnetic sensor applications. Hall transport
is being reported for the first time for h-NiNWs, and electrical conductivity
at room temperature was studied to assess their applicability as a
Hall sensor wherein the Hall coefficient RH was found to be −1.39 × 10–12 Ω
cm/Oe. Electromagnetic characterization of synthesized h-NiNWs shows
excellent microwave shielding effectiveness of above 24 dB for the
Ku band (12.4–18 GHz) and a maximum value of 32 dB at 14 GHz
for a sample with a thickness of about 1 mm. A room-temperature-curable
screen-printable ink was formulated using the synthesized magnetic
nanostructures and printed on different flexible substrates. Printed
patterns show promising ferromagnetic properties, and they could be
potential candidates for soft magnetic sensor applications.