The Role of Cu Length on the Magnetic Behaviour of Fe/Cu Multi-Segmented Nanowires

Suellen Moraes; David Navas; Fanny Béron; Mariana  P. Proenca; Kleber  R. Pirota; Célia  T. Sousa; João  P. Araújo

doi:10.3390/nano8070490

Nanomaterials (Jul 2018)

The Role of Cu Length on the Magnetic Behaviour of Fe/Cu Multi-Segmented Nanowires

Suellen Moraes,
David Navas,
Fanny Béron,
Mariana P. Proenca,
Kleber R. Pirota,
Célia T. Sousa,
João P. Araújo

Affiliations

Suellen Moraes: Instituto de Física dos Materiais da Universidade do Porto—Instituto de Nanotecnologia and Department Física e Astronomia da Faculdade de Ciências da Universidade do Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal
David Navas: Instituto de Física dos Materiais da Universidade do Porto—Instituto de Nanotecnologia and Department Física e Astronomia da Faculdade de Ciências da Universidade do Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal
Fanny Béron: Instituto de Física Gleb Wataghin (IFGW), Universidade Estadual de Campinas (UNICAMP), Campinas, SP 13083-859, Brazil
Mariana P. Proenca: Instituto de Física dos Materiais da Universidade do Porto—Instituto de Nanotecnologia and Department Física e Astronomia da Faculdade de Ciências da Universidade do Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal
Kleber R. Pirota: Instituto de Física Gleb Wataghin (IFGW), Universidade Estadual de Campinas (UNICAMP), Campinas, SP 13083-859, Brazil
Célia T. Sousa: Instituto de Física dos Materiais da Universidade do Porto—Instituto de Nanotecnologia and Department Física e Astronomia da Faculdade de Ciências da Universidade do Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal
João P. Araújo: Instituto de Física dos Materiais da Universidade do Porto—Instituto de Nanotecnologia and Department Física e Astronomia da Faculdade de Ciências da Universidade do Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal

DOI: https://doi.org/10.3390/nano8070490
Journal volume & issue: Vol. 8, no. 7
p. 490

Abstract

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A set of multi-segmented Fe/Cu nanowires were synthesized by a two-step anodization process of aluminum substrates and a pulsed electrodeposition technique using a single bath. While both Fe segment length and diameter were kept constant to (30 ± 7) and (45 ± 5) nm, respectively, Cu length was varied between (15 ± 5) and (120 ± 10) nm. The influence of the non-magnetic layer thickness variation on the nanowire magnetic properties was investigated through first-order reversal curve (FORC) measurements and micromagnetic simulations. Our analysis confirmed that, in the multi-segmented Fe/Cu nanowires with shorter Cu segments, the dipolar coupling between Fe segments controls the nanowire magnetic behavior, and its performance is like that of a homogenous Fe nanowire array of similar dimensions. On the other hand, multi-segmented Fe/Cu nanowires with larger Cu segments act like a collection of non-interacting magnetic entities (along the nanowire axis), and their global behavior is mainly controlled by the neighbor-to-neighbor nanodisc dipolar interactions.

Published in Nanomaterials

ISSN: 2079-4991 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry
Website: https://www.mdpi.com/journal/nanomaterials

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