Co100-xFex magnetic thick films prepared by electrodeposition

Co–Fe films are grown onto plane pre-treated Cu foils; the effects of the alloy composition on the morphology and the crystal texture of the electrodeposited films and their anisotropic magnetic hysteresis properties are explored. Nucleation and crystallization mechanisms in these Co-rich layers are...

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Autores principales: Aguirre, María del Carmen, Farias, Eliana Desireé, Abraham, José Amado, Urreta, Silvia Elena
Formato: article
Lenguaje:Inglés
Publicado: 2022
Materias:
Acceso en línea:http://hdl.handle.net/11086/28204
http://dx.doi.org/10.1016/j.jallcom.2014.11.197
http://dx.doi.org/10.1016/j.jallcom.2014.11.197
Aporte de:
id I10-R141-11086-28204
record_format dspace
institution Universidad Nacional de Córdoba
institution_str I-10
repository_str R-141
collection Repositorio Digital Universitario (UNC)
language Inglés
topic CoFe films
Electrodeposition
Nanostructured layers
Soft ferromagnetism
Nucleation
Growth mechanisms
spellingShingle CoFe films
Electrodeposition
Nanostructured layers
Soft ferromagnetism
Nucleation
Growth mechanisms
Aguirre, María del Carmen
Farias, Eliana Desireé
Abraham, José Amado
Urreta, Silvia Elena
Co100-xFex magnetic thick films prepared by electrodeposition
topic_facet CoFe films
Electrodeposition
Nanostructured layers
Soft ferromagnetism
Nucleation
Growth mechanisms
description Co–Fe films are grown onto plane pre-treated Cu foils; the effects of the alloy composition on the morphology and the crystal texture of the electrodeposited films and their anisotropic magnetic hysteresis properties are explored. Nucleation and crystallization mechanisms in these Co-rich layers are also investigated with pulse-reverse plating techniques, using the first cathodic pulse current–time transients. In the diffusion controlled regime the deposition mechanism is found to involve progressive nucleation with three-dimensional (3D) growth, except for the equiatomic Fe 50Co50 solution where nucleation tends to become instantaneous. The different morphologies and size scales observed are described and correlated with coercivity. The films are electrodeposited onto electrochemically pre-treated Cu substrates from feeds of nominal Fe/Co mol ratios between 0/100 and 50/50. The composition of the deposited layers, as determined by energy dispersive X-ray spectroscopy, are quite close to the nominal values. Cyclic voltammetry determinations exhibit only a single reduction process on the cathode, indicating that a unique (Co100xFex) phase grows. Depending on composition and on the substrate pre-treatment, these layers exhibit textures with features of different sizes. X ray diffraction patterns indicate that the nanostructures with Fe contents above 20 at.% crystallize in a body-centered cubic cell, while samples with Fe contents below this value are fcc. Regarding the effect of composition on the morphology, Co and Co-rich layers are compact, with large (100–300 nm) agglomerates of quite equiaxed, densely packed particles (average 50 nm); as the iron content increases above 15 at.%, faceted particles 100 nm in size are observed. All the electrodeposited layers are soft ferromagnetic at room temperature, with an in plane easy axis; coercive fields/forces between 10 mT and 71 mT are measured at 300 K.
format article
author Aguirre, María del Carmen
Farias, Eliana Desireé
Abraham, José Amado
Urreta, Silvia Elena
author_facet Aguirre, María del Carmen
Farias, Eliana Desireé
Abraham, José Amado
Urreta, Silvia Elena
author_sort Aguirre, María del Carmen
title Co100-xFex magnetic thick films prepared by electrodeposition
title_short Co100-xFex magnetic thick films prepared by electrodeposition
title_full Co100-xFex magnetic thick films prepared by electrodeposition
title_fullStr Co100-xFex magnetic thick films prepared by electrodeposition
title_full_unstemmed Co100-xFex magnetic thick films prepared by electrodeposition
title_sort co100-xfex magnetic thick films prepared by electrodeposition
publishDate 2022
url http://hdl.handle.net/11086/28204
http://dx.doi.org/10.1016/j.jallcom.2014.11.197
http://dx.doi.org/10.1016/j.jallcom.2014.11.197
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AT abrahamjoseamado co100xfexmagneticthickfilmspreparedbyelectrodeposition
AT urretasilviaelena co100xfexmagneticthickfilmspreparedbyelectrodeposition
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