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

Research output: Contribution to journalArticle

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

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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