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

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

Research output: Contribution to journalArticle

40 Citations (Scopus)

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 languageEnglish (US)
Pages (from-to)715-721
Number of pages7
JournalJournal of Physics Condensed Matter
Volume14
Issue number4
DOIs
StatePublished - Feb 4 2002

Fingerprint

Aluminum Oxide
Nanowires
Surface morphology
Magnetic properties
nanowires
Alumina
aluminum oxides
Chemical activation
wire
Wire
activation
magnetic properties
Coercive force
coercivity
temperature dependence
Energy barriers
Electrodeposition
electrodeposition
templates
Temperature

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Effects of surface morphology on magnetic properties of Ni nanowire arrays in self-ordered porous alumina. / Zeng, H.; Michalski, S.; Kirby, R. D.; Sellmyer, David J; Menon, L.; Bandyopadhyay, S.

In: Journal of Physics Condensed Matter, Vol. 14, No. 4, 04.02.2002, p. 715-721.

Research output: Contribution to journalArticle

Zeng, H. ; Michalski, S. ; Kirby, R. D. ; Sellmyer, David J ; Menon, L. ; Bandyopadhyay, S. / Effects of surface morphology on magnetic properties of Ni nanowire arrays in self-ordered porous alumina. In: Journal of Physics Condensed Matter. 2002 ; Vol. 14, No. 4. pp. 715-721.
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