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Magnetic Properties of 100 NM-Period Nickel Nanowire Arrays Obtained from Ordered Porous-Alumina Templates

Published online by Cambridge University Press:  17 March 2011

K. Nielsch ,
R.B. Wehrspohn ,
S.F. Fischer ,
H. Kronmüller ,
J. Barthel ,
J. Kirschner  and
U. Gösele
K. Nielsch
Affiliation:
Max-Planck-Institute of Microstructure Physics, Weinberg 2, 06120 Halle, Germany
R.B. Wehrspohn
Affiliation:
Max-Planck-Institute of Microstructure Physics, Weinberg 2, 06120 Halle, Germany
S.F. Fischer
Affiliation:
Max-Planck-Institute of Metal Research, Heisenbergstr. 1, 70569 Stuttgart, Germany
H. Kronmüller
Affiliation:
Max-Planck-Institute of Metal Research, Heisenbergstr. 1, 70569 Stuttgart, Germany
J. Barthel
Affiliation:
Max-Planck-Institute of Microstructure Physics, Weinberg 2, 06120 Halle, Germany
J. Kirschner
Affiliation:
Max-Planck-Institute of Microstructure Physics, Weinberg 2, 06120 Halle, Germany
U. Gösele
Affiliation:
Max-Planck-Institute of Microstructure Physics, Weinberg 2, 06120 Halle, Germany
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Abstract

Ni nanowires were grown in highly-ordered anodic alumina templates using pulsed electrodeposition. This technique yields completely metal-filled alumina membranes. The magnetic behavior of 100 nm period arrays of Ni nanowires with a length of 1 μ and different diameters has been characterized using SQUID magnetometry and magnetic force microscopy. Reducing the diameter from initially 50 to 25 nm while keeping the interwire distance constant leads to increasing coercive fields from 600 Oe to 1200 Oe and to increasing remanence from 30% to 100% of the hysteresis. The deposition of Ni65Fe35 gave a further improvement of the coercive fields up to 1350 Oe.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 636: Symposium D – Nonlithographic and Lithographic Methods of Nanofabrication-From Ultralarge Scale , 2000 , D1.9.1
Copyright
Copyright © Materials Research Society 2001

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