Journal
APPLIED PHYSICS LETTERS
Volume 99, Issue 18, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3657412
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Funding
- National Basic Research Program of China (973 Program) [2011CB302005]
- National Natural Science Foundation of China [60776011, 10874178, 11074248, 60806002]
- Natural Science Foundation of Jilin province [201115013]
- Swedish Research Council
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Room temperature ferromagnetism (RTFM) was observed in Li-N codoped ZnO thin films [ZnO:(Li, N)] fabricated by plasma-assisted molecular beam epitaxy, and p-type ZnO:(Li, N) shows the strongest RTFM. Positron annihilation spectroscopy and low temperature photoluminescence measurements indicate that the RTFM in ZnO:(Li, N) is attributed to the defect complex related to V-Zn, such as V-Zn and Li-i-NO-V-Zn complex, well supported by first-principles calculations. The incorporation of NO can stabilize and enhance the RTFM of ZnO:(Li, N) by combining with Li-i to form Li-i-NO complex, which restrains the compensation of Li-i for V-Zn and makes the ZnO:(Li, N) conduct in p-type. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3657412]
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