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Magnetization Reversal and Magnetic Anisotropy in Ordered CoNiP Nanowire Arrays: Effects of Wire Diameter

Ordered CoNiP nanowires with the same length of 4 µm and varying diameters (d = 100 nm–600 nm) were fabricated by electrodeposition of CoNiP onto polycarbonate templates. X-ray diffraction, scanning electron microscopy, and high-resolution transmission electron microscopy confirmed the quality of th...

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Autores principales: Van Thiem, Luu, Tu, Le Tuan, Phan, Manh-Huong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4435145/
https://www.ncbi.nlm.nih.gov/pubmed/25760054
http://dx.doi.org/10.3390/s150305687
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author Van Thiem, Luu
Tu, Le Tuan
Phan, Manh-Huong
author_facet Van Thiem, Luu
Tu, Le Tuan
Phan, Manh-Huong
author_sort Van Thiem, Luu
collection PubMed
description Ordered CoNiP nanowires with the same length of 4 µm and varying diameters (d = 100 nm–600 nm) were fabricated by electrodeposition of CoNiP onto polycarbonate templates. X-ray diffraction, scanning electron microscopy, and high-resolution transmission electron microscopy confirmed the quality of the fabricated nanowires. Magnetic measurements and theoretical analysis revealed that the magnetization reversal and magnetic anisotropy were significantly influenced by varying of the diameters of the nanowires. There existed a critical wire diameter (d(c) ≈ 276 nm), below which the magnetization reversal occurred via a coherent rotation mode, and above which the magnetization reversal occurred via a curling rotation mode. The easy axis of the magnetization tended to change in direction from parallel to perpendicular with respect to the wire axis as the wire diameter exceeded d(c) ≈ 276 nm. With increasing wire diameter, the coercive field (H(c)) and the remanent to saturation magnetization ratio (M(r)/M(s)) were also found to rapidly decrease in the range d = 100–400 nm and gradually decrease for d > 400 nm.
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spelling pubmed-44351452015-05-19 Magnetization Reversal and Magnetic Anisotropy in Ordered CoNiP Nanowire Arrays: Effects of Wire Diameter Van Thiem, Luu Tu, Le Tuan Phan, Manh-Huong Sensors (Basel) Article Ordered CoNiP nanowires with the same length of 4 µm and varying diameters (d = 100 nm–600 nm) were fabricated by electrodeposition of CoNiP onto polycarbonate templates. X-ray diffraction, scanning electron microscopy, and high-resolution transmission electron microscopy confirmed the quality of the fabricated nanowires. Magnetic measurements and theoretical analysis revealed that the magnetization reversal and magnetic anisotropy were significantly influenced by varying of the diameters of the nanowires. There existed a critical wire diameter (d(c) ≈ 276 nm), below which the magnetization reversal occurred via a coherent rotation mode, and above which the magnetization reversal occurred via a curling rotation mode. The easy axis of the magnetization tended to change in direction from parallel to perpendicular with respect to the wire axis as the wire diameter exceeded d(c) ≈ 276 nm. With increasing wire diameter, the coercive field (H(c)) and the remanent to saturation magnetization ratio (M(r)/M(s)) were also found to rapidly decrease in the range d = 100–400 nm and gradually decrease for d > 400 nm. MDPI 2015-03-09 /pmc/articles/PMC4435145/ /pubmed/25760054 http://dx.doi.org/10.3390/s150305687 Text en © 2015 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Van Thiem, Luu
Tu, Le Tuan
Phan, Manh-Huong
Magnetization Reversal and Magnetic Anisotropy in Ordered CoNiP Nanowire Arrays: Effects of Wire Diameter
title Magnetization Reversal and Magnetic Anisotropy in Ordered CoNiP Nanowire Arrays: Effects of Wire Diameter
title_full Magnetization Reversal and Magnetic Anisotropy in Ordered CoNiP Nanowire Arrays: Effects of Wire Diameter
title_fullStr Magnetization Reversal and Magnetic Anisotropy in Ordered CoNiP Nanowire Arrays: Effects of Wire Diameter
title_full_unstemmed Magnetization Reversal and Magnetic Anisotropy in Ordered CoNiP Nanowire Arrays: Effects of Wire Diameter
title_short Magnetization Reversal and Magnetic Anisotropy in Ordered CoNiP Nanowire Arrays: Effects of Wire Diameter
title_sort magnetization reversal and magnetic anisotropy in ordered conip nanowire arrays: effects of wire diameter
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4435145/
https://www.ncbi.nlm.nih.gov/pubmed/25760054
http://dx.doi.org/10.3390/s150305687
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