Effects of surface morphology on magnetic properties of Ni nanowire arrays in self-ordered porous alumina

H. Zeng; S. Michalski; R. D. Kirby; D. J. Sellmyer; L. Menon; S. Bandyopadhyay

doi:10.1088/0953-8984/14/4/306

Effects of surface morphology on magnetic properties of Ni nanowire arrays in self-ordered porous alumina

H. Zeng, S. Michalski, R. D. Kirby, D. J. Sellmyer, L. Menon, S. Bandyopadhyay

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

45 Scopus citations

Abstract

Ni nanowire arrays were produced by electrodeposition of Ni into self-assembled porous anodic alumina templates. With different anodization voltages, the wires show different surface morphologies. The temperature dependence of the coercivity and activation volume of wires with regular shape can be explained by thermal activation over an energy barrier with a 3/2 power dependence on the field. The wires with irregular surface morphologies show abnormal temperature dependences of the coercivity and activation volume. Possible mechanisms for these behaviours are discussed.

Original language	English (US)
Pages (from-to)	715-721
Number of pages	7
Journal	Journal of Physics Condensed Matter
Volume	14
Issue number	4
DOIs	https://doi.org/10.1088/0953-8984/14/4/306
State	Published - Feb 4 2002

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics

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abstract = "Ni nanowire arrays were produced by electrodeposition of Ni into self-assembled porous anodic alumina templates. With different anodization voltages, the wires show different surface morphologies. The temperature dependence of the coercivity and activation volume of wires with regular shape can be explained by thermal activation over an energy barrier with a 3/2 power dependence on the field. The wires with irregular surface morphologies show abnormal temperature dependences of the coercivity and activation volume. Possible mechanisms for these behaviours are discussed.",

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AU - Zeng, H.

AU - Michalski, S.

AU - Kirby, R. D.

AU - Sellmyer, D. J.

AU - Menon, L.

AU - Bandyopadhyay, S.

PY - 2002/2/4

Y1 - 2002/2/4

N2 - Ni nanowire arrays were produced by electrodeposition of Ni into self-assembled porous anodic alumina templates. With different anodization voltages, the wires show different surface morphologies. The temperature dependence of the coercivity and activation volume of wires with regular shape can be explained by thermal activation over an energy barrier with a 3/2 power dependence on the field. The wires with irregular surface morphologies show abnormal temperature dependences of the coercivity and activation volume. Possible mechanisms for these behaviours are discussed.

AB - Ni nanowire arrays were produced by electrodeposition of Ni into self-assembled porous anodic alumina templates. With different anodization voltages, the wires show different surface morphologies. The temperature dependence of the coercivity and activation volume of wires with regular shape can be explained by thermal activation over an energy barrier with a 3/2 power dependence on the field. The wires with irregular surface morphologies show abnormal temperature dependences of the coercivity and activation volume. Possible mechanisms for these behaviours are discussed.

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Effects of surface morphology on magnetic properties of Ni nanowire arrays in self-ordered porous alumina

Abstract

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