Berlin 2018 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 8: Focus Session: Magnetic structurally and compositionally modulated nanowires and nanotubes
MA 8.2: Vortrag
Montag, 12. März 2018, 15:30–15:45, H 1012
3D cobalt nanotubes grown by focused electron beam induced deposition — Javier Pablo-Navarro1, •César Magén1,2, Amalio Fernandez-Pacheco3, Luis Alfredo Rodriguez4, and José María De Teresa1,2 — 1Laboratorio de Microscopias Avanzadas (LMA), Instituto de Nanociencia de Aragon (INA), Universidad de Zaragoza, 50018 Zaragoza, Spain — 2Instituto de Ciencia de Materiales de Aragon (ICMA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain — 3Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, UK — 4Departamento de Física, Universidad del Valle, A. A. 25 360, Cali, Colombia
Magnetic nanotubes are potential candidates for fast and low-power domain wall conduit in future 3D spintronic devices. We report for the first time the successful growth of 3D cobalt nanotubes by focused electron induced deposition (FEBID) on 3D Pt-FEBID nanowire templates of 100 nm in diameter. Cross sectional Transmission Electron Microscopy characterization has confirmed that nanotubes with a wall thickness down to 11 nm can be achieved. These cobalt nanotubes are nanocrystalline and present a metallic content of 70 at. Co%. Magnetic characterization by electron holography and MOKE magnetometry experiments on individual nanotubes demonstrate that these nanostructures are ferromagnetic, with an estimated remanent magnetic induction of 0.9 T and coercivity around 160 Oe. This work evidences that FEBID is a suitable technique to grow complex functional heterostructures in 3D with potential for application in high density magnetic memory and logic devices.