标题:Mechanism of polar catastrophe cancelling induced by charge compensation for epitaxy γ-Fe2O3film on MgO(001) substrate: A theoretical investigation
作者:Cheng, Bin ;Qin, Hongwei ;Liu, Liang ;Xie, Jihao ;Hu, Jifan
作者机构:[Cheng, Bin ;Qin, Hongwei ;Liu, Liang ;Xie, Jihao ;Hu, Jifan ] School of Physics, State Key Laboratory for Crystal Materials, Shandong University, Jin 更多
通讯作者:Hu, Jifan
来源:Superlattices and Microstructures
出版年:2018
卷:120
页码:377-381
DOI:10.1016/j.spmi.2018.05.065
摘要:The interface of γ-Fe2O3/MgO(001) film have revived considerable attention. Polar catastrophe at the interface of γ-Fe2O3/MgO(001) film was investigated and an attempt to investigate the interface structure and growth mode of γ-Fe2O3/MgO(001) was given. The results show that the stoichiometric γ-Fe2O3with tetragonal space group of P41212 should grow on MgO(001) in the [100] or [010] direction. The charge compensation by modifying the stoichiometry in the interface layer can not only stabilize the polar surface, but also give a reasonable interpretation for why the saturation magnetization (Ms) values of the very thin γ-Fe2O3/MgO films are larger than the bulk value of γ-Fe2O3in experimental studies. This study may widen the application of maghemite especially the γ-Fe2O3/MgO film.
© 2018 Elsevier Ltd
收录类别:EI
资源类型:期刊论文
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