3D Nanomagnetism in Low Density Interconnected Nanowire Networks

• DOI: 10.1021/acs.nanolett.0c04366
• Publication Date: 2020-12-11T18:53:00Z
• Authors: Edward C. Burks; Dustin A. Gilbert; Peyton D. Murray; Chad Flores; Thomas E. Felter; Supakit Charnvani...; Sergei O. Kucheyev; Jeffrey D. Colvin; Gen Yin; Kai Liu
• Keywords: 3D information storage; Condensed Matter - Materials Science; Condensed Matter - Mesoscale and Nanoscale Physics; Materials Science (cond-mat.mtrl-sci); FOS: Physical sciences; 02 engineering and technology; 530; multistate magnetic configurations; 3D nanomagnetism; cond-mat.mtrl-sci; 620; Engineering; nanowire networks; cond-mat.mes-hall; Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Nanotechnology; Nanoscience & Nanotechnology; 0210 nano-technology

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