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Porous Silicon Nanocomposites with Combined Hard and Soft Magnetic Properties

Magnetic nanostructures of two ferromagnetic metals have been combined within porous silicon, and the magnetic switching behavior of the resulting porous silicon/metal nanocomposite has been modified by varying the arrangement. The two magnetic materials are Ni and Co, whereas Co is the magnetic har...

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Detalles Bibliográficos
Autores principales: Rumpf, Klemens, Granitzer, Petra, Michor, Herwig
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer US 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5021640/
https://www.ncbi.nlm.nih.gov/pubmed/27624341
http://dx.doi.org/10.1186/s11671-016-1617-0
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author Rumpf, Klemens
Granitzer, Petra
Michor, Herwig
author_facet Rumpf, Klemens
Granitzer, Petra
Michor, Herwig
author_sort Rumpf, Klemens
collection PubMed
description Magnetic nanostructures of two ferromagnetic metals have been combined within porous silicon, and the magnetic switching behavior of the resulting porous silicon/metal nanocomposite has been modified by varying the arrangement. The two magnetic materials are Ni and Co, whereas Co is the magnetic harder one. These “hard/soft” magnetic nanocomposites have been achieved by two different routes. On the one hand, double-sided porous silicon has been used whereas one side has been filled with Ni nanostructures and the other one with Co nanostructures. On the other hand, Ni and Co have been deposited within one porous layer alternatingly. The filling of the pores has been carried out by electrodeposition with varying the deposition parameters. In systems which offer two distinct slopes of the hysteresis curves due to the different saturation behavior of the two types of deposited metal, magnetic exchange coupling is not present. For samples which show smooth hysteresis curves exchange, coupling between the Ni and Co nanostructures seems to be present. The aim is to control especially the structure size of the soft and the hard magnetic materials and the distance between them at the nanoscale to optimize exchange coupling resulting in a maximum energy product.
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spelling pubmed-50216402016-09-26 Porous Silicon Nanocomposites with Combined Hard and Soft Magnetic Properties Rumpf, Klemens Granitzer, Petra Michor, Herwig Nanoscale Res Lett Nano Express Magnetic nanostructures of two ferromagnetic metals have been combined within porous silicon, and the magnetic switching behavior of the resulting porous silicon/metal nanocomposite has been modified by varying the arrangement. The two magnetic materials are Ni and Co, whereas Co is the magnetic harder one. These “hard/soft” magnetic nanocomposites have been achieved by two different routes. On the one hand, double-sided porous silicon has been used whereas one side has been filled with Ni nanostructures and the other one with Co nanostructures. On the other hand, Ni and Co have been deposited within one porous layer alternatingly. The filling of the pores has been carried out by electrodeposition with varying the deposition parameters. In systems which offer two distinct slopes of the hysteresis curves due to the different saturation behavior of the two types of deposited metal, magnetic exchange coupling is not present. For samples which show smooth hysteresis curves exchange, coupling between the Ni and Co nanostructures seems to be present. The aim is to control especially the structure size of the soft and the hard magnetic materials and the distance between them at the nanoscale to optimize exchange coupling resulting in a maximum energy product. Springer US 2016-09-13 /pmc/articles/PMC5021640/ /pubmed/27624341 http://dx.doi.org/10.1186/s11671-016-1617-0 Text en © The Author(s). 2016 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
spellingShingle Nano Express
Rumpf, Klemens
Granitzer, Petra
Michor, Herwig
Porous Silicon Nanocomposites with Combined Hard and Soft Magnetic Properties
title Porous Silicon Nanocomposites with Combined Hard and Soft Magnetic Properties
title_full Porous Silicon Nanocomposites with Combined Hard and Soft Magnetic Properties
title_fullStr Porous Silicon Nanocomposites with Combined Hard and Soft Magnetic Properties
title_full_unstemmed Porous Silicon Nanocomposites with Combined Hard and Soft Magnetic Properties
title_short Porous Silicon Nanocomposites with Combined Hard and Soft Magnetic Properties
title_sort porous silicon nanocomposites with combined hard and soft magnetic properties
topic Nano Express
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5021640/
https://www.ncbi.nlm.nih.gov/pubmed/27624341
http://dx.doi.org/10.1186/s11671-016-1617-0
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