Magnetic and electronic properties of Fe3O4/graphene heterostructures: First principles perspective

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[1] Mi, Wenbo
[2] Yang, Hua
[3] Cheng, Yingchun
[4] Chen, Guifeng
[5] Bai, Haili
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Mi, W. (miwenbo@tju.edu.cn) | 1600年 / American Institute of Physics Inc.卷 / 113期
关键词：
Magnetic and electronic properties of Fe3O4(111)/ graphene heterostructures are investigated by first principles calculations. Different structural models have been considered; which differ in the interface termination of Fe3O4(111) surface with respect to the same monolayer graphene. In three models; the magnetic moment of Fe(A) has a major change due to less O atoms surrounding Fe(A) atoms than Fe(B). Magnetic moment is enhanced by 8.5%; 18.5%; and 8.7% for models (a); (b); and; (c); respectively; Furthermore; the spin polarization of models (a) and (c) is lowered due to the simultaneous occurrence of density of states of spin-up Fe(A) and spin-down Fe(B) at Fermi lever. The spin polarization of model (b) remains the same as that of bulk Fe3O4. Our results suggest that different interface terminations and Fe(A) play an important role in determining the magnetism strength and spin polarization. © 2013 American Institute of Physics;
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