Oxygen vacancies induced ferromagnetic behaviors in Co 3 O 4–δ : An experimental and first-principles study
KAUST DepartmentPhysical Science and Engineering (PSE) Division
Online Publication Date2018-06-15
Print Publication Date2018-08
Permanent link to this recordhttp://hdl.handle.net/10754/630739
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AbstractThe structural and magnetic properties of CoO were investigated by both first-principles and experimental studies. The results of first-principles calculations indicate that the spin splitting induced by oxygen vacancies can lead to the net moment in the CoO. The density of states of CoO shows a band gap of 2.2 eV, while the impurity states appear with the oxygen vacancies. Furthermore, the CoO films with oxygen vacancies were grown on MgAlO and SrTiO substrates by using reactive sputtering. The structural analysis reveals that the CoO films are epitaxial. Consistent with the first-principles study, magnetism is observed in the CoO films, which attributes to the oxygen vacancies influencing spin structure by superexchange interaction.
CitationWang P, Jin C, Li P, Zheng DX, Gong JL, et al. (2018) Oxygen vacancies induced ferromagnetic behaviors in Co 3 O 4–δ : An experimental and first-principles study. Thin Solid Films 660: 287–293. Available: http://dx.doi.org/10.1016/j.tsf.2018.06.022.
SponsorsThis work was supported by National Natural Science Foundation of China (11774254, 11304221, and 51272174).
JournalThin Solid Films