Abstracts Book - IMRC 2018

• SA6-P037
COMPOSITION AND DIAMETER MODULATION OF MAGNETIC
NANOWIRE ARRAYS FABRICATED BY A NOVEL APPROACH
Juan Escrig 1,2 , Mohamed Shaker Salem 3 , Felipe Tejo 2 , Robert Zierold 4 , Philip Sergelius 4 , Josep M.
Montero Moreno 4 , Detlef Goerlitz 4 , Kornelius Nielsch 4,5
1
Center for the Development of Nanoscience and Nanotechnology, , Chile. 2 Universidad de
Santiago de Chile, Departamento de Física, Chile. 3 Cairo University, Physics Department, Egypt.
4 UNIVERSITY OF HAMBURG, Institute of Nanostructure and Solid State Physics, Germany.
5 Leibniz-Institute for Solid State and Materials Research Dresden (IFW Dresden), Institute of
Metallic Materials, Germany.
Straight magnetic nanowires composed of nickel and permalloy segments
having different diameters are synthesized using a promising approach. This
approach involves the controlled electrodeposition of each magnetic material
into specially designed diameter-modulated porous alumina templates.
Standard alumina templates are exposed to pore widening followed by
a protective coating of the pore wall with ultrathin silica and further anodization.
Micromagnetic simulations are employed to investigate the process of
magnetization reversal in the fabricated nanowires when the magnetic
materials exchange their places in the thick and thin segments. It is found that
the magnetization reversal occurs by the propagation of transverse domain
wall (DW) when the thick segment is composed of permalloy. However, the
reversal process proceeds by the propagation of vortex DW when permalloy is
located at the thin segment.
Acknowledgment:
M S Salem acknowledges funding support the Alexander von Humboldt-Stiftung,
Germany. In Chile, this work was supported by the Fondecyt Grant 1150952,
Fondequip EQM120045, Financiamiento Basal para Centros Cientifícos y
Tecnológicos de Excelencia FB0807, and Conicyt-PCHA/Doctorado Nacional/
2014.
Keywords: Magnetic nanowires, Electrodeposition, Atomic Layer Deposition
Presenting authors email: juan.escrig@usach.cl