Perpendicular magnetic anisotropy in Ta vertical bar Co40Fe40B20 vertical bar MgAl2O4 structures and perpendicular CoFeB vertical bar MgAl2O4 vertical bar CoFeB magnetic tunnel junction

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	Perpendicular magnetic anisotropy in Ta vertical bar Co40Fe40B20 vertical bar MgAl2O4 structures and perpendicular CoFeB vertical bar MgAl2O4 vertical bar CoFeB magnetic tunnel junction
	Tao, BS ; Li, DL ; Yuan, ZH ; Liu, HF ; Ali, SS ; Feng, JF ; Wei, HX ; Han, XF ; Liu, Y ; Zhao, YG ; Zhang, Q ; Guo, ZB ; Zhang, XX
刊名	APPLIED PHYSICS LETTERS
	2014
卷号	105 期号:10
ISSN号	0003-6951
通讯作者	Han, XF (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
中文摘要	Magnetic properties of Co40Fe40B20 (CoFeB) thin films sandwiched between Ta and MgAl2O4 layers have been systematically studied. For as-grown state, Ta/CoFeB/MgAl2O4 structures exhibit good perpendicular magnetic anisotropy (PMA) with interface anisotropy K-i = 1.22 erg/cm(2), which further increases to 1.30 erg/cm(2) after annealing, while MgAl2O4/CoFeB/Ta multilayer shows in-plane magnetic anisotropy and must be annealed in order to achieve PMA. For bottom CoFeB layer, the thickness window for PMA is from 0.6 to 1.0nm, while that for top CoFeB layer is between 0.8 and 1.4 nm. Perpendicular magnetic tunnel junctions (p-MTJs) with a core structure of CoFeB/MgAl2O4/CoFeB have also been fabricated and tunneling magnetoresistance ratio of about 36% at room temperature and 63% at low temperature have been obtained. The intrinsic excitations in the p-MTJs have been identified by inelastic electron-tunneling spectroscopy. (C) 2014 AIP Publishing LLC.
资助信息	State Key Project of Fundamental Research of Ministry of Science and Technology [MOST] [2010CB934401, 2014AA032904]; National Natural Science Foundation [NSFC] [51229101, 11174341, 11222432]
语种	英语
公开日期	2015-04-14
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/58889]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Tao, BS,Li, DL,Yuan, ZH,et al. Perpendicular magnetic anisotropy in Ta vertical bar Co40Fe40B20 vertical bar MgAl2O4 structures and perpendicular CoFeB vertical bar MgAl2O4 vertical bar CoFeB magnetic tunnel junction[J]. APPLIED PHYSICS LETTERS,2014,105(10).
APA	Tao, BS.,Li, DL.,Yuan, ZH.,Liu, HF.,Ali, SS.,...&Zhang, XX.(2014).Perpendicular magnetic anisotropy in Ta vertical bar Co40Fe40B20 vertical bar MgAl2O4 structures and perpendicular CoFeB vertical bar MgAl2O4 vertical bar CoFeB magnetic tunnel junction.APPLIED PHYSICS LETTERS,105(10).
MLA	Tao, BS,et al."Perpendicular magnetic anisotropy in Ta vertical bar Co40Fe40B20 vertical bar MgAl2O4 structures and perpendicular CoFeB vertical bar MgAl2O4 vertical bar CoFeB magnetic tunnel junction".APPLIED PHYSICS LETTERS 105.10(2014).