Magnetoelastic anisotropy induced effects on field and temperature dependent magnetization reversal of Ni nanowires and nanotubes

Naeem Ahmad, J. Y. Chen, W. P. Zhou, D. P. Liu, X. F. Han

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

Vertically aligned Ni nanowires and nanotubes have been electrodeposited in alumina templates at room temperature. The detailed study of angular dependent coercivity and squareness demonstrates that the magnetic easy axis of Ni nanowires is perpendicular to that of Ni nanotubes axis. The mechanisms of magnetization reversal in Ni nanowires and Ni nanotubes are found to occur through the nucleation mode with the propagation of transverse domain wall and curling mode, respectively. Field dependant magnetization results at different temperatures have depicted that the magnetocrystalline anisotropy might cause a crossover of easy axis at room temperature to that of low temperature in both Ni nanowires and nanotubes. Furthermore, the variation in temperature dependent coercivity illustrates that the magnetoelastic anisotropy induced by the alumina matrix plays a dominant role in the magnetization reversal of the nanowires and nanotubes at low temperature.

Original languageEnglish (US)
Pages (from-to)785-792
Number of pages8
JournalJournal of Superconductivity and Novel Magnetism
Volume24
Issue number1-2
DOIs
StatePublished - Jan 1 2011

Keywords

  • Curling mode
  • Magnetization reversal
  • Magnetoelastic anisotropy
  • Nucleation mode
  • Shape anisotropy

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