Next Article in Journal / Special Issue
ZnO Nanowire Networks as Photoanode Model Systems for Photoelectrochemical Applications
Previous Article in Journal
Electrochemical Engineering of Nanoporous Materials
Previous Article in Special Issue
Effect of Sharp Diameter Geometrical Modulation on the Magnetization Reversal of Bi-Segmented FeNi Nanowires
Article Menu

Export Article

Open AccessArticle
Nanomaterials 2018, 8(9), 692; https://doi.org/10.3390/nano8090692

A Comparative Study of Magnetic Properties of Large Diameter Co Nanowires and Nanotubes

1
Instituto de Ciencia de Materiales de Madrid, CSIC, 28049 Madrid, Spain
2
Physics department, Federal University of Santa Maria, RS 97105-900, Brazil
*
Authors to whom correspondence should be addressed.
Received: 27 July 2018 / Revised: 24 August 2018 / Accepted: 4 September 2018 / Published: 6 September 2018
(This article belongs to the Special Issue Synthesis and Characterization of Nanowires)
Full-Text   |   PDF [3276 KB, uploaded 6 September 2018]   |  

Abstract

A comparative study of the magnetic properties of the arrays of Co nanowires and nanotubes with large external diameters (180 nm) has been carried out. The nanowires/nanotubes were grown by electrodeposition into the self-assembled pores of anodic alumina membranes. The experimental study of their magnetic behavior was focused on the angular dependence of hysteresis loops and their parameters. In both nanowire and nanotube arrays, from the analysis of experimental data, effective longitudinal magnetic anisotropy is concluded, which is stronger in the case of the nanotube array. In addition, the extremely small remanence observed for all loops indicates the important role played by magnetostatic interactions. Micromagnetic simulations were first performed considering intrinsic shape and magnetocrystalline anisotropy terms, together with an effective easy-plane anisotropy to account for those magnetostatic interactions. A qualitative agreement between experiments and simulations is found despite the complexity introduced by the intrinsic and extrinsic array properties (i.e., large diameters, grain structure, and array configuration). In addition, simulations were also carried out for individual nanowire/nanotube with a particular emphasis to understand their differences at the remanence, due to pure geometry contribution. View Full-Text
Keywords: magnetic nanowires and arrays; magnetic nanotubes; magnetization reversal; coercivity and remanence angular dependence; micromagnetic simulations magnetic nanowires and arrays; magnetic nanotubes; magnetization reversal; coercivity and remanence angular dependence; micromagnetic simulations
Figures

Graphical abstract

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Fernandez-Roldan, J.A.; Chrischon, D.; Dorneles, L.S.; Chubykalo-Fesenko, O.; Vazquez, M.; Bran, C. A Comparative Study of Magnetic Properties of Large Diameter Co Nanowires and Nanotubes. Nanomaterials 2018, 8, 692.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Nanomaterials EISSN 2079-4991 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top