Transport Properties in Sputtered CoFeB/MgAl2O4/CoFeB Magnetic Tunnel Junctions

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	Transport Properties in Sputtered CoFeB/MgAl2O4/CoFeB Magnetic Tunnel Junctions
	Tao, BS ; Li, DL ; Liu, HF ; Wei, HX ; Feng, JF ; Wang, SG ; Han, XF
刊名	IEEE TRANSACTIONS ON MAGNETICS
	2014
卷号	50 期号:11
关键词	Direct elastic tunneling inelastic electron tunneling spectroscopy magnon-assisted inelastic tunneling tunneling magnetoresistance (TMR)
ISSN号	0018-9464
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	CoFeB/MgAl2O4/CoFeB magnetic tunnel junctions (MTJs) with the barrier sputtered from sintered MgAl2O4 target have been successfully fabricated. Dependence of tunneling magnetoresistance (TMR) ratio on both MgAl2O4 deposition pressure and postannealing temperature has been studied. The TMR ratio of more than 50% at room temperature was obtained with an annealing temperature of 325 degrees C and MgAl2O4 deposition pressure of 1.3 Pa. Temperature dependence of resistance in both parallel and antiparallel configurations can be well fitted by the model based on direct elastic tunneling and magnon-assisted inelastic tunneling. Inelastic electron tunneling spectroscopy (IETS) at low temperature, exhibiting three peaks originating from zero-bias anomaly, interface magnons, and barrier phonons, were measured and compared with the results of AlOx and MgO-based MTJs. The IETS for all three types of MTJs shows quite similar peak positions for all kinds of elementary excitations except barrier phonons.
资助信息	National Natural Science Foundation of China (NSFC) [11174341, 11222432, 11274371]; State Key Project of Fundamental Research of Ministry of Science and Technology [(MOST)] [2010CB934400, 2014AA032904]
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/311004/59099]
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,Liu, HF,et al. Transport Properties in Sputtered CoFeB/MgAl2O4/CoFeB Magnetic Tunnel Junctions[J]. IEEE TRANSACTIONS ON MAGNETICS,2014,50(11).
APA	Tao, BS.,Li, DL.,Liu, HF.,Wei, HX.,Feng, JF.,...&Han, XF.(2014).Transport Properties in Sputtered CoFeB/MgAl2O4/CoFeB Magnetic Tunnel Junctions.IEEE TRANSACTIONS ON MAGNETICS,50(11).
MLA	Tao, BS,et al."Transport Properties in Sputtered CoFeB/MgAl2O4/CoFeB Magnetic Tunnel Junctions".IEEE TRANSACTIONS ON MAGNETICS 50.11(2014).