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The accurate tuning of the magnetization processes at the nanoscale is crucial for the development of future nano-devices. Here, we analyzed the magnetization of Ni nanostructures with 15\u2013100\u00a0nm in diameter and 12\u2013230\u00a0nm in length and compared our results with experimental data for periodic arrays. Our modelling led to a phase diagram of the reversal modes where the presence of a critical diameter (<jats:italic>d<\/jats:italic>\u00a0\u2248\u00a030\u00a0nm) triggered the type of domain wall (DW) formed (transverse or vortex); while a critical length (<jats:italic>L<\/jats:italic>\u00a0\u2248\u00a0100\u00a0nm) determined the number of DWs nucleated. Moreover, vortex-DWs originated from 3D skyrmion tubes, reported as one of the best configurations for storage devices. By increasing the diameter and aspect-ratio of nanowires with <jats:italic>L<\/jats:italic>\u2009&gt;\u2009100\u00a0nm, three reversal modes were observed: simultaneous propagation of two vortex-DWs; propagation of one vortex-DW; or spiral rotation of both DWs through \u201ccorkscrew\u201d mechanism. Only for very low aspect-ratios (nanodisks), no skyrmion tubes were observed and reversal occurred by spiral rotation of one vortex-DW. The broad range of nanostructures studied allowed the creation of a complete phase diagram, highly important for future choice of nanoscaled dimensions in the development of novel nano-devices.<\/jats:p>","DOI":"10.1038\/s41598-021-89474-z","type":"journal-article","created":{"date-parts":[[2021,5,12]],"date-time":"2021-05-12T10:03:45Z","timestamp":1620813825000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":30,"title":["Magnetic reversal modes in cylindrical nanostructures: from disks to wires"],"prefix":"10.1038","volume":"11","author":[{"given":"Mariana P.","family":"Proenca","sequence":"first","affiliation":[]},{"given":"Javier","family":"Rial","sequence":"additional","affiliation":[]},{"given":"Joao P.","family":"Araujo","sequence":"additional","affiliation":[]},{"given":"Celia T.","family":"Sousa","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2021,5,12]]},"reference":[{"key":"89474_CR1","doi-asserted-by":"publisher","first-page":"15756","DOI":"10.1038\/ncomms15756","volume":"8","author":"A Fern\u00e1ndez-Pacheco","year":"2017","unstructured":"Fern\u00e1ndez-Pacheco, A. et al. 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