Effect of surface oxidation on the magnetization reversal of cobalt planar wires

C. C. Chiang, S. Ko, Shih-ying Hsu*

*Corresponding author for this work

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

The influence of the antiferromagnetic layer of cobalt oxide on the magnetization reversal of a submicron cobalt planar wire was studied using the magneto-transport measurements. For pure Cobalt (Co) planar wires of width less than 1.2 μm, length of 30 μm, and thickness of 30 nm, the shape anisotropy dominates the magnetic behavior revealing all characteristics of a single domain structure. With oxidation, there is a thin layer of CoO on top of the Co layer and the exchange coupling between the CoO (antiferromagnet) and Co (ferromagnetic) layers may suppress the shape anisotropy induced single domain structure and the typical switching behavior of magnetization reversal. The magnetic configuration and magnetization reversal are determined by the competition of unidirectional anisotropy and exchange coupling constant.

Original languageEnglish
Pages (from-to)1381-1384
Number of pages4
JournalJournal of Superconductivity and Novel Magnetism
Volume26
Issue number4
DOIs
StatePublished - 1 Apr 2013

Keywords

  • Exchange coupling
  • Magnetization reversal
  • Shape anisotropy
  • Single domain structure

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