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

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

doi:10.1063/1.2221881

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 journal › Article › peer-review

55 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 language	English (US)
Article number	022508
Journal	Applied Physics Letters
Volume	89
Issue number	2
DOIs	https://doi.org/10.1063/1.2221881
State	Published - 2006
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.2221881

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title = "Room temperature ferromagnetism in two-step-prepared Co-doped ZnO bulks",

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.",

author = "T. Zhu and Zhan, {W. S.} and Wang, {W. G.} and Xiao, {John Q.}",

note = "Funding Information: This work was supported by Chinese Academy of Sciences, NSFC, and NSF DMR Grant No. 0405-136. One of the authors (T.Z.) also thanks for the partial financial support from Alexander von Humboldt foundation and Dr. H. Braak in Juelich research center, Germany, for the help on Hall effect measurements.",

year = "2006",

doi = "10.1063/1.2221881",

language = "English (US)",

volume = "89",

journal = "Applied Physics Letters",

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AU - Zhu, T.

AU - Zhan, W. S.

AU - Wang, W. G.

AU - Xiao, John Q.

N1 - Funding Information: This work was supported by Chinese Academy of Sciences, NSFC, and NSF DMR Grant No. 0405-136. One of the authors (T.Z.) also thanks for the partial financial support from Alexander von Humboldt foundation and Dr. H. Braak in Juelich research center, Germany, for the help on Hall effect measurements.

PY - 2006

Y1 - 2006

N2 - 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.

AB - 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.

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

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