{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,9]],"date-time":"2026-04-09T09:39:41Z","timestamp":1775727581300,"version":"3.50.1"},"reference-count":55,"publisher":"MDPI AG","issue":"10","license":[{"start":{"date-parts":[[2021,10,15]],"date-time":"2021-10-15T00:00:00Z","timestamp":1634256000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Nanomaterials"],"abstract":"<jats:p>Multi-segmented bilayered Fe\/Cu nanowires have been fabricated through the electrodeposition in porous anodic alumina membranes. We have assessed, with the support of micromagnetic simulations, the dependence of fabricated nanostructures\u2019 magnetic properties either on the number of Fe\/Cu bilayers or on the length of the magnetic layers, by fixing both the nonmagnetic segment length and the wire diameter. The magnetic reversal, in the segmented Fe nanowires (NWs) with a 300 nm length, occurs through the nucleation and propagation of a vortex domain wall (V-DW) from the extremities of each segment. By increasing the number of bilayers, the coercive field progressively increases due to the small magnetostatic coupling between Fe segments, but the coercivity found in an Fe continuous nanowire is not reached, since the interactions between layers is limited by the Cu separation. On the other hand, Fe segments 30 nm in length have exhibited a vortex configuration, with around 60% of the magnetization pointing parallel to the wires\u2019 long axis, which is equivalent to an isolated Fe nanodisc. By increasing the Fe segment length, a magnetic reversal occurred through the nucleation and propagation of a V-DW from the extremities of each segment, similar to what happens in a long cylindrical Fe nanowire. The particular case of the Fe\/Cu bilayered nanowires with Fe segments 20 nm in length revealed a magnetization oriented in opposite directions, forming a synthetic antiferromagnetic system with coercivity and remanence values close to zero.<\/jats:p>","DOI":"10.3390\/nano11102729","type":"journal-article","created":{"date-parts":[[2021,10,17]],"date-time":"2021-10-17T23:05:47Z","timestamp":1634511947000},"page":"2729","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":19,"title":["The Magnetic Properties of Fe\/Cu Multilayered Nanowires: The Role of the Number of Fe Layers and Their Thickness"],"prefix":"10.3390","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1996-768X","authenticated-orcid":false,"given":"Sofia","family":"Caspani","sequence":"first","affiliation":[{"name":"IFIMUP and Departamento de F\u00edsica e Astronomia, Faculdade de Ci\u00eancias Universidade do Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3110-2424","authenticated-orcid":false,"given":"Suellen","family":"Moraes","sequence":"additional","affiliation":[{"name":"IFIMUP and Departamento de F\u00edsica e Astronomia, Faculdade de Ci\u00eancias Universidade do Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal"}]},{"given":"David","family":"Navas","sequence":"additional","affiliation":[{"name":"ICMM-CSIC-Instituto de Ciencia de Materiales de Madrid, Sor Juana In\u00e9s de la Cruz 3, 28049 Madrid, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0003-0491","authenticated-orcid":false,"given":"Mariana P.","family":"Proenca","sequence":"additional","affiliation":[{"name":"IFIMUP and Departamento de F\u00edsica e Astronomia, Faculdade de Ci\u00eancias Universidade do Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal"},{"name":"ISOM and Dpto. Electr\u00f3nica F\u00edsica, Universidad Polit\u00e9cnica de Madrid, Avda. Complutense 30, 28040 Madrid, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1341-9719","authenticated-orcid":false,"given":"Ricardo","family":"Magalh\u00e3es","sequence":"additional","affiliation":[{"name":"IFIMUP and Departamento de F\u00edsica e Astronomia, Faculdade de Ci\u00eancias Universidade do Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal"}]},{"given":"Cl\u00e1udia","family":"Nunes","sequence":"additional","affiliation":[{"name":"LAQV, REQUIMTE, Faculty of Pharmacy of Porto University, 4050-313 Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1646-7727","authenticated-orcid":false,"given":"Jo\u00e3o Pedro","family":"Ara\u00fajo","sequence":"additional","affiliation":[{"name":"IFIMUP and Departamento de F\u00edsica e Astronomia, Faculdade de Ci\u00eancias Universidade do Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2879-0051","authenticated-orcid":false,"given":"C\u00e9lia T.","family":"Sousa","sequence":"additional","affiliation":[{"name":"IFIMUP and Departamento de F\u00edsica e Astronomia, Faculdade de Ci\u00eancias Universidade do Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2021,10,15]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Peng, X. (2012). Nanowires: Recent Advances, IntechOpen.","DOI":"10.5772\/3367"},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Zhai, T., and Yao, J. (2012). One-Dimensional Nanostructures: Principles and Applications, Wiley.","DOI":"10.1002\/9781118310342"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"8233","DOI":"10.1039\/C5NR01100K","article-title":"Shape matters: Synthesis and biomedical applications of high aspect ratio magnetic nanomaterials","volume":"7","author":"Fratila","year":"2015","journal-title":"Nanoscale"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"271","DOI":"10.1007\/s12034-007-0047-0","article-title":"Nanowires: Properties, applications and synthesis via porous anodic aluminium oxide template","volume":"30","author":"Sarkar","year":"2007","journal-title":"Bull. Mater. Sci."},{"key":"ref_5","doi-asserted-by":"crossref","unstructured":"Piraux, L. (2020). Magnetic Nanowires. Appl. Sci., 10.","DOI":"10.3390\/app10051832"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"011310","DOI":"10.1063\/1.5121702","article-title":"Magnetic nanostructures for emerging biomedical applications","volume":"7","author":"Peixoto","year":"2020","journal-title":"Appl. Phys. Rev."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"363001","DOI":"10.1088\/0022-3727\/49\/36\/363001","article-title":"Magnetism in curved geometries","volume":"49","author":"Streubel","year":"2016","journal-title":"J. Phys. D Appl. Phys."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"097202","DOI":"10.1103\/PhysRevLett.121.097202","article-title":"Monopole-Induced Emergent Electric Fields in Ferromagnetic Nanowires","volume":"121","author":"Charilaou","year":"2018","journal-title":"Phys. Rev. Lett."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"5923","DOI":"10.1039\/C8NR00024G","article-title":"Magnetization pinning in modulated nanowires: From topological protection to the \u201ccorkscrew\u201d mechanism","volume":"10","author":"Bran","year":"2018","journal-title":"Nanoscale"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"1340009","DOI":"10.1142\/S2010324713400092","article-title":"Curvature-Induced Magnetochirality","volume":"Volume 3","author":"Hertel","year":"2013","journal-title":"SPIN"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"483002","DOI":"10.1088\/0953-8984\/28\/48\/483002","article-title":"Ultrafast domain wall dynamics in magnetic nanotubes and nanowires","volume":"28","author":"Hertel","year":"2016","journal-title":"J. Phys. Condens. Matter"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"353","DOI":"10.1002\/adma.200390087","article-title":"One-Dimensional Nanostructures: Synthesis, Characterization, and Applications","volume":"15","author":"Xia","year":"2003","journal-title":"Adv. Mater."},{"key":"ref_13","first-page":"321","article-title":"Fabrication of nanowires and nanotubes by anodic alumina template-assisted electrodeposition","volume":"Volume 1","author":"Stepniowski","year":"2014","journal-title":"Manufacturing Nanostructures"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"287","DOI":"10.1080\/17458080802570617","article-title":"Electrodeposition of nickel nanowires and nanotubes using various templates","volume":"3","author":"Ertan","year":"2008","journal-title":"J. Exp. Nanosci."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"489","DOI":"10.1140\/epjb\/e2004-00163-4","article-title":"Arrays of Ni nanowires in alumina membranes: Magnetic properties and spatial ordering","volume":"40","author":"Pirota","year":"2004","journal-title":"Eur. Phys. J. B"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"7487","DOI":"10.1021\/cr500002z","article-title":"Porous Anodic Aluminum Oxide: Anodization and Templated Synthesis of Functional Nanostructures","volume":"114","author":"Lee","year":"2014","journal-title":"Chem. Rev."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"335301","DOI":"10.1088\/0957-4484\/27\/33\/335301","article-title":"Tuning the magnetic properties of multisegmented Ni\/Cu electrodeposited nanowires with controllable Ni lengths","volume":"27","author":"Susano","year":"2016","journal-title":"Nanotechnology"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"165416","DOI":"10.1103\/PhysRevB.90.165416","article-title":"Magnetothermopower and magnetoresistance of single Co-Ni\/Cu multilayered nanowires","volume":"90","author":"Niemann","year":"2014","journal-title":"Phys. Rev. B"},{"key":"ref_19","doi-asserted-by":"crossref","unstructured":"Moraes, S., Navas, D., Beron, F., Proenca, M.P., Pirota, K.R., Sousa, C.T., and Ara\u00fajo, J.P. (2018). The Role of Cu Length on the Magnetic Behaviour of Fe\/Cu Multi-Segmented Nanowires. Nanomaterials, 8.","DOI":"10.3390\/nano8070490"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"38","DOI":"10.1016\/j.spmi.2016.04.009","article-title":"Axially adjustable magnetic properties in arrays of multilayered Ni\/Cu nanowires with variable segment sizes","volume":"95","author":"ATehrani","year":"2016","journal-title":"Superlattices Microstruct."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"262","DOI":"10.1016\/j.jmmm.2013.10.054","article-title":"Fabrication and magnetic properties of electrodeposited Ni\/Cu nanowires using the double bath method","volume":"354","author":"Maleak","year":"2014","journal-title":"J. Magn. Magn. Mater."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"2745","DOI":"10.1109\/TMAG.2008.2002000","article-title":"Magnetic Behavior of Ni\/Cu Multilayer Nanowire Arrays Studied by First-Order Reversal Curve Diagrams","volume":"44","author":"Carignan","year":"2008","journal-title":"IEEE Trans. Magn."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"8253","DOI":"10.1063\/1.1556136","article-title":"Micromagnetic behavior of electrodeposited Ni\/Cu multilayer nanowires","volume":"93","author":"Chen","year":"2003","journal-title":"J. Appl. Phys."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"1595","DOI":"10.1021\/cm052262b","article-title":"Potential Modulated Multilayer Deposition of Multisegment Cu\/Ni Nanowires with Tunable Magnetic Properties","volume":"18","author":"Chen","year":"2006","journal-title":"Chem. Mater."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"435709","DOI":"10.1088\/0957-4484\/18\/43\/435709","article-title":"The interaction field in arrays of ferromagnetic barcode nanowires","volume":"18","author":"Clime","year":"2007","journal-title":"Nanotechnology"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"355003","DOI":"10.1088\/0022-3727\/47\/35\/355003","article-title":"A new approach to fabricating magnetic multilayer nanowires by modifying the ac pulse electrodeposition in a single bath","volume":"47","author":"Ramazani","year":"2014","journal-title":"J. Phys. D Appl. Phys."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"1728","DOI":"10.4028\/www.scientific.net\/MSF.654-656.1728","article-title":"Fabrication of Co\/Cu Multilayered Nanowires Using a Pulsed Current Deposition Technique","volume":"654\u2013656","author":"Ohgai","year":"2010","journal-title":"Mater. Sci. Forum"},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"032504","DOI":"10.1063\/1.3073740","article-title":"Probing magnetic configurations in Co\/Cu multilayered nanowires","volume":"94","author":"Wong","year":"2009","journal-title":"Appl. Phys. Lett."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"2500204","DOI":"10.1109\/TMAG.2013.2279278","article-title":"Magnetic Anisotropy Evolution in CoFe\/Au Barcode Nanowire Arrays","volume":"50","author":"Park","year":"2014","journal-title":"IEEE Trans. Magn."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1140\/epjp\/i2015-15002-0","article-title":"The effect of deposition parameters on the magnetic behavior of CoFe\/Cu multilayer nanowires","volume":"130","author":"Ramazani","year":"2015","journal-title":"Eur. Phys. J. Plus"},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"188","DOI":"10.1016\/j.jmmm.2006.06.032","article-title":"Magnetic layer thickness dependence of magnetization reversal in electrodeposited CoNi\/Cu multilayer nanowires","volume":"309","author":"Tang","year":"2007","journal-title":"J. Magn. Magn. Mater."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"023902","DOI":"10.1063\/1.4887488","article-title":"Off-axis electron holography of ferromagnetic multilayer nanowires","volume":"116","author":"Carignan","year":"2014","journal-title":"J. Appl. Phys."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"2870","DOI":"10.1557\/jmr.2006.0348","article-title":"Fabrication and magnetic behavior of Co\/Cu multilayered nanowires","volume":"21","author":"Tan","year":"2006","journal-title":"J. Mater. Res."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"4070","DOI":"10.1039\/c3ce40231b","article-title":"Orientation-dependent growth rate of crystalline plane study in electrodeposited Ni\/Cu superlattice nanowires","volume":"15","author":"Xu","year":"2013","journal-title":"Cryst. Eng. Comm."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"128","DOI":"10.1016\/j.jmmm.2014.03.029","article-title":"Properties of electrodeposited CoFe\/Cu multilayers: The effect of Cu layer thickness","volume":"373","author":"Sahin","year":"2015","journal-title":"J. Magn. Magn. Mater."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"155003","DOI":"10.1088\/1361-6463\/aa622e","article-title":"Magnetic behaviour of multisegmented FeCoCu\/Cu electrodeposited nanowires","volume":"50","author":"Araujo","year":"2017","journal-title":"J. Phys. D Appl. Phys."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"7389","DOI":"10.1021\/acsami.5b01143","article-title":"Multisegmented FeCo\/Cu Nanowires: Electrosynthesis, Characterization, and Magnetic Control of Biomolecule Desorption","volume":"7","author":"Shamsudhin","year":"2015","journal-title":"ACS Appl. Mater. Interfaces"},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"095709","DOI":"10.1088\/1361-6528\/aa585f","article-title":"Co\/Au multisegmented nanowires: A 3D array of magnetostatically coupled nanopillars","volume":"28","author":"Bran","year":"2017","journal-title":"Nanotechnology"},{"key":"ref_39","doi-asserted-by":"crossref","unstructured":"Berganza, E., Jaafar, M., Bran, C., Fern\u00e1ndez-Rold\u00e1n, J.A., Chubykalo-Fesenko, O., V\u00e1zquez, M., and Asenjo, A. Multisegmented Nanowires: A Step towards the Control of the Domain Wall Configuration; Scientific Reports: London, UK, 2017; Volume 7, p. 1, 1576.","DOI":"10.1038\/s41598-017-11902-w"},{"key":"ref_40","doi-asserted-by":"crossref","unstructured":"Wang, D.-S., Mukhtar, A., Wu, K.-M., Gu, L., and Cao, X. (2019). Multi-Segmented Nanowires: A High Tech Bright Future. Materials, 12.","DOI":"10.3390\/ma12233908"},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"230","DOI":"10.1016\/j.matchemphys.2013.11.021","article-title":"The effect of magnetic layer thickness on magnetic properties of Fe\/Cu multilayer nanowires","volume":"144","author":"Ramazani","year":"2014","journal-title":"Mater. Chem. Phys."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"664","DOI":"10.1021\/cm0208962","article-title":"Ordered Ni\u2212Cu Nanowire Array with Enhanced Coercivity","volume":"15","author":"Guo","year":"2003","journal-title":"Chem. Mater."},{"key":"ref_43","doi-asserted-by":"crossref","unstructured":"Gamburg, Y.D., and Zangari, G. (2011). Theory and Practice of Metal Electrodeposition, Springer.","DOI":"10.1007\/978-1-4419-9669-5"},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"225","DOI":"10.1016\/0022-0728(82)85080-8","article-title":"Electrochemical nucleation: Part I. General considerations","volume":"138","author":"Gunawardena","year":"1982","journal-title":"J. Electroanal. Chem. Interfacial Electrochem."},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"879","DOI":"10.1016\/0013-4686(83)85163-9","article-title":"Theoretical and experimental studies of multiple nucleation","volume":"28","author":"Scharifker","year":"1983","journal-title":"Electrochim. Acta"},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"215","DOI":"10.1016\/j.electacta.2012.04.036","article-title":"Ni growth inside ordered arrays of alumina nanopores: Enhancing the deposition rate","volume":"72","author":"Proenca","year":"2012","journal-title":"Electrochim. Acta"},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"135","DOI":"10.1016\/0022-0728(88)80135-9","article-title":"Note on a theory of three-dimensional electrochemical nucleation with diffusion-controlled growth","volume":"247","author":"Jacobs","year":"1988","journal-title":"J. Electroanal. Chem. Interfacial Electrochem."},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"1927","DOI":"10.1088\/0022-3727\/31\/16\/001","article-title":"Electrochemical deposition of metals onto silicon","volume":"31","author":"Oskam","year":"1998","journal-title":"J. Phys. D Appl. Phys."},{"key":"ref_49","doi-asserted-by":"crossref","first-page":"435705","DOI":"10.1088\/0957-4484\/27\/43\/435705","article-title":"Magnetic interactions in compositionally modulated nanowire arrays","volume":"27","author":"Palmero","year":"2016","journal-title":"Nanotechnology"},{"key":"ref_50","doi-asserted-by":"crossref","first-page":"107133","DOI":"10.1063\/1.4899186","article-title":"The design and verification of MuMax3","volume":"4","author":"Vansteenkiste","year":"2014","journal-title":"AIP Adv."},{"key":"ref_51","doi-asserted-by":"crossref","first-page":"2586","DOI":"10.1016\/j.commatsci.2011.03.046","article-title":"The energetic and structural properties of bcc NiCu, FeCu alloys: A first-principles study","volume":"50","author":"Xie","year":"2011","journal-title":"Comput. Mater. Sci."},{"key":"ref_52","doi-asserted-by":"crossref","first-page":"637","DOI":"10.1016\/j.jmmm.2011.09.001","article-title":"Micromagnetic simulation of Fe asymmetric nanoring","volume":"324","author":"Palma","year":"2012","journal-title":"J. Magn. Magn. Mater."},{"key":"ref_53","doi-asserted-by":"crossref","first-page":"67008","DOI":"10.1209\/0295-5075\/86\/67008","article-title":"Measurement of the vortex core in sub-100\u2009nm Fe dots using polarized neutron scattering","volume":"86","author":"Roshchin","year":"2009","journal-title":"EPL (Europhys. Lett.)"},{"key":"ref_54","doi-asserted-by":"crossref","first-page":"485001","DOI":"10.1088\/0022-3727\/46\/48\/485001","article-title":"Magnetic reversal modes in cylindrical nanowires","volume":"46","author":"Ivanov","year":"2013","journal-title":"J. Phys. D Appl. Phys."},{"key":"ref_55","doi-asserted-by":"crossref","first-page":"2330","DOI":"10.1016\/j.actamat.2009.12.019","article-title":"Towards smooth and pure iron nanowires grown by electrodeposition in self-organized alumina membranes","volume":"58","author":"Haehnel","year":"2010","journal-title":"Acta Mater."}],"container-title":["Nanomaterials"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2079-4991\/11\/10\/2729\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T07:15:48Z","timestamp":1760166948000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2079-4991\/11\/10\/2729"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,10,15]]},"references-count":55,"journal-issue":{"issue":"10","published-online":{"date-parts":[[2021,10]]}},"alternative-id":["nano11102729"],"URL":"https:\/\/doi.org\/10.3390\/nano11102729","relation":{},"ISSN":["2079-4991"],"issn-type":[{"value":"2079-4991","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,10,15]]}}}