Strong anti-strain capacity of CoFeB/MgO interface on electronic structure and state coupling

Guo Fei, Wu Yaping^†, Wu Zhiming^‡, Chen Ting, Li Heng, Zhang Chunmiao, Fu Mingming, Lu Yihong, Kang Junyong^¶

(color online) Stable configurations of Fe/MgO, CoFe/MgO, and CoFeB/MgO interfaces. (a) O atoms sit atop the Fe atom for the Fe/MgO interface, (b) the Co and Fe atoms appear in the interfacial layer for the CoFe/MgO interface, and (c) B atom locates in the octahedral interstitial site for the CoFeB/MgO interface. The orange, brownish yellow, red, blue, and green balls represent Mg, Fe, O, Co, and B atoms, respectively.