TITLE

Co doped ZnO(0001)-Zn by diffusion method and its magnetic properties

AUTHOR(S)
Xie, W. G.; Xie, F. Y.; Yu, X. L.; Xue, K.; Xu, J. B.; Chen, J.; Zhang, R.
PUB. DATE
December 2009
SOURCE
Applied Physics Letters;12/28/2009, Vol. 95 Issue 26, p262506
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The diffusion behaviors of Co clusters on clean ZnO(0001)-Zn single crystal surface and their magnetic properties are studied. Co clusters are deposited on the clean ZnO(0001)-Zn surface at room temperature and then undergone ultrahigh vacuum annealing until fully reconstructed. The replacement of Zn2+ by Co2+ is confirmed by scanning tunneling microscopy and x-ray photoelectron spectroscopy. The Co doped ZnO shows a weak ferromagnetism at room temperature with a saturation magnetic moment of 1.08 μB/Co. Our observations indicate that surface Zn vacancies facilitate Co diffusion, and the interplay of Co ion with internal O vacancies leads to the ferromagnetism.
ACCESSION #
47244452

 

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