Tuning the magnetization reversal process of FeCoCu nanowire arrays by thermal annealing

Arrays of hexagonally ordered Fe28Co67Cu5 nanowires with tailored diameter from 18 to 27 nm were prepared by electroplating into anodic alumina templates and annealed in the temperature range of 300–600 °C, preserving but refining their bcc crystal structure. Despite the partial reduction of saturat...

Full description

Saved in:
Bibliographic Details
Published in:Journal of applied physics 2013-07, Vol.114 (4)
Main Authors: Bran, C., Ivanov, Yu. P., García, J., del Real, R. P., Prida, V. M., Chubykalo-Fesenko, O., Vazquez, M.
Format: Article
Language:English
Subjects:
Annealing
Arrays
Coercive force
Nanocomposites
Nanomaterials
Nanowires
Reduction
Saturation (magnetic)
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Arrays of hexagonally ordered Fe28Co67Cu5 nanowires with tailored diameter from 18 to 27 nm were prepared by electroplating into anodic alumina templates and annealed in the temperature range of 300–600 °C, preserving but refining their bcc crystal structure. Despite the partial reduction of saturation magnetization and corresponding shape anisotropy after annealing at 500 °C, larger coercivity, 0.36 T, and squareness ratio, Mr/Ms = 0.98, were obtained. This unexpected behavior is interpreted through micromagnetic simulations where the magnetic hardening is associated with the transition from vortex to transverse domain-wall reversal modes connected with the reduction of saturation magnetization. Simulations also predict a significant coercivity increase with decreasing nanowires diameter which agrees with experimental data in the overlapping diameter range.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4816479