130953 20240202151703.0 doi 10.1016/j.actamat.2019.05.035 sideral 113062 ART-2019-113062 eng Pablo-Navarro, Javier Universidad de Zaragoza (orcid)0000-0001-6771-6941 In situ real-time annealing of ultrathin vertical Fe nanowires grown by focused electron beam induced deposition 2019 Focused Electron Beam Induced Deposition is a consolidated technique for the growth of three-dimensional (3D) nanostructures. However, this single-step nanofabrication method requires further efforts to optimize simultaneously dimensional and compositional properties, in particular for deposits with a high aspect ratio. More specifically, ferromagnetic 3D nanowires (NWs) with diameters in the sub-50 nm regime and high metallic contents up to 95 at. % attract great interest to improve the final performance of magnetic nanodevices such as magnetic tips for scanning probe microscopy. In this work, we report on real-time monitoring during chemical purification and structural crystallization processes of ultra-narrow 3D Fe NWs (<50 nm in diameter achieved) by post-growth in situ annealing in a transmission electron microscope. NW heating up to 700 degrees C in very high vacuum reveals the local increase of the metallic content along the entire NW length concomitant with the growth of large Fe single crystals from initially amorphous compounds. A metallic purity of 95 at. % is observed in several regions, dramatically boosting the initial Fe content of 40 at. %. The real-time in situ tracking of 3D nanostructures during thermal annealing is a key element to design and optimize novel purification processes for the fabrication of customized components to be integrated in spintronic, logic and sensing devices. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/ES/DGA/E13-17R info:eu-repo/grantAgreement/EC/H2020/823717/EU/Enabling Science and Technology through European Electron Microscopy/ESTEEM3 This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 823717-ESTEEM3 info:eu-repo/grantAgreement/ES/MINECO/MAT2017-82970-C2-1-R info:eu-repo/grantAgreement/ES/MINECO/MAT2017-82970-C2-2-R info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 7.656 2019 METALLURGY & METALLURGICAL ENGINEERING 1 / 78 = 0.013 2019 Q1 T1 MATERIALS SCIENCE, MULTIDISCIPLINARY 42 / 314 = 0.134 2019 Q1 T1 3.662 2019 Ceramics and Composites 2019 Q1 Polymers and Plastics 2019 Q1 Metals and Alloys 2019 Q1 Electronic, Optical and Magnetic Materials 2019 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Winkler, Robert Haberfehlner, Georg Magen, César Universidad de Zaragoza (orcid)0000-0002-6761-6171 Plank, Harald Teresa, José María de Universidad de Zaragoza (orcid)0000-0001-9566-0738 5001 065 Universidad de Zaragoza Dpto. Ciencia Tecnol.Mater.Fl. Área Cienc.Mater. Ingen.Metal. 2003 395 Universidad de Zaragoza Dpto. Física Materia Condensa. Área Física Materia Condensada 174 (2019), 379-386 Acta mater. Acta Materialia 1359-6454 3792797 http://zaguan.unizar.es/record/130953/files/texto_completo.pdf Postprint 1544383 http://zaguan.unizar.es/record/130953/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:130953 articulos driver 2024-02-02-14:48:50 ARTICLE