Fabrication of FePt nanowires through pulsed electrodeposition into nanoporous alumina templates

• Tipo: Artigo em Revista Científica Internacional
• Data: 2022

Autores

Magalhaes, R (Autor) Outra; proenca, m. p. (Autor) FCUP; araujo, j. p. (Autor) FCUP; Nunes, C (Autor) Outra; pereira, a. m. (Autor) FCUP; Sousa, CT (Autor) FCUP

Revista

Título: Applied Nanoscience

Vol. 12

Páginas: 3573-3584

ISSN: 2190-5509

Editora: Springer Nature

Indexação

ISI Web of Knowledge - 1 Citação

Scopus - 1 Citação

Outras Informações

ID Authenticus: P-00W-GZP

DOI: 10.1007/s13204-022-02454-1

Abstract (EN): One-dimensional magnetic nanostructures have been emerging as promising nanomaterials for biomedical applications. Among those types of nanoarchitectures, FePt nanowires are particularly interesting; since they are highly biocompatible and chemically inert, their magnetic properties can be tuned by controlling not only the atomic ratio of the two elements in the alloy structure but also the nanowire's dimensions, and they have a high magnetic anisotropy. In this work, we report the fabrication of such nanostructures through pulsed electrodeposition into nanoporous aluminium oxide templates. Using this approach, we were able to control the composition of the produced nanoarchitectures by adjusting the thickness of the barrier layer, which is located at the bottom of the template, and the current density applied during the electrodeposition process. The obtained nanostructures exhibited a heterogeneous length distribution when Pt was present. Moreover, their magnetic characterization revealed an increase of the magnetic hysteresis, coercivity, remanence, and saturation field as the Fe atomic percent got higher. Furthermore, hysteresis loops of FePt nanowire arrays were simulated and compared with the experimental measurements. Such comparison suggested that the nanostructures with Pt in their composition might have different stoichiometries along their length.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 12