Room temperature ferromagnetism in two-step-prepared Co-doped ZnO bulks

T. Zhu, W. S. Zhan, W. G. Wang, John Q. Xiao

Research output: Contribution to journalArticle

53 Scopus citations

Abstract

We have prepared Co-doped ZnO bulks with a two-step method. The bulk samples are sintered at the temperature above 1000°C to get pure single phase and then treated by Zn vapor in a vacuum. Based on such two-step preparation, clear carrier induced ferromagnetism is found in Zn treated Co-doped ZnO bulks, which suggests that the magnetism mechanism can be of codoping effect. The onset of ferromagnetism is associated with the further increase of the hybridization of the impurity band with 3d states near the Fermi level when additional carrier induced to let the Stoner criterion for ferromagnetism to be satisfied.

Original languageEnglish (US)
Article number022508
JournalApplied Physics Letters
Volume89
Issue number2
DOIs
StatePublished - Oct 17 2006
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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