Journal
JOURNAL OF SYNCHROTRON RADIATION
Volume 17, Issue -, Pages 600-605Publisher
WILEY-BLACKWELL PUBLISHING, INC
DOI: 10.1107/S0909049510020303
Keywords
DMS; oxygen vacancy; XANES
Categories
Funding
- National Outstanding Youth Fund [10125523]
- National Natural Science Foundation of China [10705046]
- Chinese Academy of Sciences [KJCX2-YW-N42]
Ask authors/readers for more resources
To clarify the mechanism of the observed room-temperature ferromagnetism (RTF), many studies have been focused on dilute magnetic semiconductor systems Several investigations have demonstrated that oxygen vacancies play a significant role in mediating the RTF behavior so that much effort has been devoted to confirm their presence. In this investigation, X-ray absorption spectroscopy was combined with ab mitro calculations of the electronic structure of Co and Zn in the Zn(0.9)Co(1)O 10 system before and after annealing, which has been recognized as an effective method of originating oxygen vacancies A feature at about 20 eV after the rising edge of the Co K-edge XANES that disappears after annealing has been associated with the presence of an oxygen vacancy located in the second shell surrounding the Co atom Moreover, Zn Kedge XANES spectra point out that this oxygen vacancy affects the electronic structure near the Fermi level, in agreement with density functional theory calculations.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available