Microstructure and magnetic properties of Ni:ZnO nanorod/Zn:NiO nanowall composite structures

G. Venkataiah, Michael R.S. Huang, H. L. Su, C. P. Liu, J. C.A. Huang

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The microstructure, growth mechanism, and ferromagnetic (FM)/antiferromagnetic (AFM) coupling have been discussed in Ni:ZnO nanorod/Zn:NiO nanowall composite structures. The composite structures were synthesized by a hydrothermal method at 90 °C. A systematic investigation of high-resolution transmission electron microscopy, X-ray absorption spectroscopy, and magnetization studies reveals that the as-synthesized product shows FM behavior at room temperature, whereas the annealed sample shows mixed (FM/AFM) magnetic behavior. A detectable magnetic exchange coupling between FM/AFM has been demonstrated by magnetization measurements in the annealed products. The observed room-temperature FM behavior in these nanostructures was interpreted in terms of bound magnetic polarons.

Original languageEnglish
Pages (from-to)16191-16196
Number of pages6
JournalJournal of Physical Chemistry C
Volume114
Issue number39
DOIs
Publication statusPublished - 2010 Oct 7

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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