First-principles investigation of magnetocrystalline anisotropy oscillations in Co2FeAl/Ta heterostructures

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	First-principles investigation of magnetocrystalline anisotropy oscillations in Co2FeAl/Ta heterostructures
	Qiao, Junfeng; Peng, Shouzhong; Zhang, Youguang; Yang, Hongxin; Zhao, Weisheng
刊名	PHYSICAL REVIEW B
	2018
卷号	97 期号:5
关键词	Magnetic-anisotropy Trilayers Energy
英文摘要	We report first-principles investigations of magnetocrystalline anisotropy energy (MCAE) oscillations as a function of capping layer thickness in Heusler alloy Co2FeAl/Ta heterostructures. A substantial oscillation is observed in the FeAl-interface structure. According to k-space and band-decomposed charge-density analyses, this oscillation is mainly attributed to the Fermi-energy-vicinal quantum well states (QWSs) which are confined between the Co2FeAl/Ta interface and Ta/vacuum surface. The smaller oscillation magnitude in the Co-interface structure can be explained by the smooth potential transition at the interface. These findings clarify that MCAE in Co2FeAl/Ta is not a local property of the interface and that the quantum well effect plays a dominant role in MCAE oscillations of the heterostructures. This work presents the possibility of tuning MCAE by QWSs in capping layers and paves the way for artificially controlling magnetic anisotropy energy in magnetic tunnel junctions.
学科主题	Materials Science ; Physics
语种	英语
公开日期	2018-12-04
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/16804]
专题	2018专题
推荐引用方式 GB/T 7714	Qiao, Junfeng,Peng, Shouzhong,Zhang, Youguang,et al. First-principles investigation of magnetocrystalline anisotropy oscillations in Co2FeAl/Ta heterostructures[J]. PHYSICAL REVIEW B,2018,97(5).
APA	Qiao, Junfeng,Peng, Shouzhong,Zhang, Youguang,Yang, Hongxin,&Zhao, Weisheng.(2018).First-principles investigation of magnetocrystalline anisotropy oscillations in Co2FeAl/Ta heterostructures.PHYSICAL REVIEW B,97(5).
MLA	Qiao, Junfeng,et al."First-principles investigation of magnetocrystalline anisotropy oscillations in Co2FeAl/Ta heterostructures".PHYSICAL REVIEW B 97.5(2018).