Berlin 2018 – scientific programme
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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur
KFM 21: Lithography II: Focused Electron Beam Induced Processing: 3D Nano-Printing for Material Science (Focussed Session): Afternoon Session (joint session DS/KFM)
KFM 21.5: Talk
Wednesday, March 14, 2018, 16:00–16:15, H 2032
Purified and crystalline three-dimensional electron-beam-induced deposits: the successful case of cobalt — Javier Pablo-Navarro1, César Magén1,2, and •José María De Teresa1,2 — 1Laboratorio de Microscopías Avanzadas (LMA) - Instituto de Nanociencia de Aragón (INA), Universidad de Zaragoza, 50018 Zaragoza, Spain. — 2Instituto de Ciencia de Materiales de Aragón (ICMA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain.
Purified and crystalline 3D cobalt nanowires of diameter below 90 nm have been fabricated by ex-situ high-vacuum annealing at 600 Celsius degrees after FEBID growth. While increasing the metallic content of the nanowires up to 95 atomic percent, the thermal annealing process induces the recrystallization of the pseudo-amorphous as-grown structure into bulk-like, hcp and fcc crystallites with lateral sizes comparable to the width of the nanowire. The net magnetization increases 80 percent with respect to as-grown values, close to the bulk cobalt value. This achievement opens new pathways for applications of this synthetic method in the fabrication of either individual or arrays of 3D high-purity and crystalline cobalt nanowires for high-density memory and logic devices, nanosensors and actuators, and could be a viable method to obtain other pure and crystalline 3D materials by FEBID.