Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2011-10-31

Journal: APPLIED PHYSICS LETTERS

Included Journals: EI、SCIE、Scopus

Volume: 99

Issue: 18

ISSN: 0003-6951

Abstract: 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]