3D Nanomagnetism in Low Density Interconnected Nanowire Networks

Abstract

Free-standing, interconnected metallic nanowire networks with density as low as 40 mg/cm^{3} have been achieved over cm-scale areas, using electrodeposition into polycarbonate membranes that have been ion-tracked at multiple angles. Networks of interconnected magnetic nanowires further provide an exciting platform to explore 3-dimensional nanomagnetism, where their structure, topology and frustration may be used as additional degrees of freedom to tailor the materials properties. New magnetization reversal mechanisms in cobalt networks are captured by the first-order reversal curve method, which demonstrate the evolution from strong demagnetizing dipolar interactions to intersections-mediated domain wall pinning and propagation, and eventually to shape-anisotropy dominated magnetization reversal. These findings open up new possibilities for 3-dimensional integrated magnetic devices for memory, complex computation, and neuromorphics.

24 pages, 4 figures; 3 page Supporting Information with 1 figure. Nano Letters (2020)

References in corpus (9)

• Artificial "spin ice" in a geometrically frustrated lattice of nanoscale ferromagnetic islands
• Magnetic Fingerprints of sub-100 nm Fe Nanodots
• Magnetochiral symmetry breaking in a Möbius ring
• Reversal-Field Memory in the Hysteresis of Spin Glasses
• Engineering Relaxation Pathways in Building Blocks of Artificial Spin Ice for Computation
• Fabrication, detection and operation of a three-dimensional nanomagnetic conduit
• Controlling magnetization reversal in Co/Pt nanostructures with perpendicular anisotropy
• Tunable Low Density Palladium Nanowire Foams
• Probing Magnetic Configurations in Co/Cu Multilayered Nanowires

Cited by in corpus (3)

• Observation of hydrogen-induced Dzyaloshinskii-Moriya interaction and reversible switching of magnetic chirality
• Efficient and Robust Metallic Nanowire Foams for Deep Submicrometer Particulate Filtration
• Hydroxide-based magneto-ionics: electric-field control of reversible paramagnetic-to-ferromagnetic switch in $\alpha$-Co(OH)${}_2$ films