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

• Type: Article in International Scientific Journal
• Date: 2018

Authors

Moraes, S (Author) Other; Navas, D (Author) Other; Beron, F (Author) Other; proenca, m. p. (Author) FCUP; Pirota, KR (Author) Other; Sousa, CT (Author) FCUP; araujo, j. p. (Author) FCUP

Journal

Title: Nanomaterials

Vol. 8

Final page: 490

ISSN: 2079-4991

Publisher: MDPI

Indexing

ISI Web of Knowledge - 29 Citations

Scopus - 33 Citations

Other information

Authenticus ID: P-00P-HH6

DOI: 10.3390/nano8070490

Abstract (EN): 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 12