Controlling spin-dependent tunneling by bandgap tuning in epitaxial rocksalt MgZnO films

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	Controlling spin-dependent tunneling by bandgap tuning in epitaxial rocksalt MgZnO films
	Li, DL ; Ma, QL ; Wang, SG ; Ward, RCC ; Hesjedal, T ; Zhang, XG ; Kohn, A ; Amsellem, E ; Yang, G ; Liu, JL ; Jiang, J ; Wei, HX ; Han, XF
刊名	SCIENTIFIC REPORTS
	2014
卷号	4
ISSN号	2045-2322
通讯作者	Wang, SG (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, State Key Lab Magnetism, Beijing 100190, Peoples R China.
中文摘要	Widespread application of magnetic tunnel junctions (MTJs) for information storage has so far been limited by the complicated interplay between tunnel magnetoresistance (TMR) ratio and the product of resistance and junction area (RA). An intricate connection exists between TMR ratio, RA value and the bandgap and crystal structure of the barrier, a connection that must be unravelled to optimise device performance and enable further applications to be developed. Here, we demonstrate a novel method to tailor the bandgap of an ultrathin, epitaxial Zn-doped MgO tunnel barrier with rocksalt structure. This structure is attractive due to its good Delta(1) spin filtering effect, and we show that MTJs based on tunable MgZnO barriers allow effective balancing of TMR ratio and RA value. In this way spin-dependent transport properties can be controlled, a key challenge for the development of spintronic devices.
资助信息	National Basic Research Program of China [2015CB921401]; Natural Science Foundation of China [51431009, 51471183, 11274371, 11222432, 11174341]; National Instrumentation Program of China [2012YQ120048]; Instrument Development Program of Chinese Academy of Sciences [YZ201345]; China-Israel joint project [2013DFG13020]; John Fell Oxford University Press
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/311004/59677]
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	Li, DL,Ma, QL,Wang, SG,et al. Controlling spin-dependent tunneling by bandgap tuning in epitaxial rocksalt MgZnO films[J]. SCIENTIFIC REPORTS,2014,4.
APA	Li, DL.,Ma, QL.,Wang, SG.,Ward, RCC.,Hesjedal, T.,...&Han, XF.(2014).Controlling spin-dependent tunneling by bandgap tuning in epitaxial rocksalt MgZnO films.SCIENTIFIC REPORTS,4.
MLA	Li, DL,et al."Controlling spin-dependent tunneling by bandgap tuning in epitaxial rocksalt MgZnO films".SCIENTIFIC REPORTS 4(2014).