[1]马晓翠,舒启清,柳文军,等.Al-Al2O3-铁磁金属隧道结界面的表征[J].深圳大学学报理工版,2002,19(4):24-30.
　MA Xiao-cui,SHU Qi-qing,LIU Wen-jun,et al.Characterization of Interfaces in Al-Al2O3-Ferromagnetic Metal Tunnel Junctions[J].Journal of Shenzhen University Science and Engineering,2002,19(4):24-30.
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Al-Al2O3-铁磁金属隧道结界面的表征()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第19卷
期数:
2002年4期
页码:
24-30
栏目:
物理
出版日期:
2002-11-30

文章信息/Info

Title:
Characterization of Interfaces in Al-Al2O3-Ferromagnetic Metal Tunnel Junctions
文章编号:
1000-2618(2002)04- 0024- 07
作者:
马晓翠; 舒启清; 柳文军; 张怀宇
深圳大学理学院,深圳518060
Author(s):
MA Xiao-cui;  SHU Qi-qing;  LIU Wen-jun; ZHANG Huai-yu
College of Science Shenzhen University Shenzhen 518060 P. R. China
关键词:
隧道贯穿; 界面; 隧道结; 梯形势垒参数
Keywords:
tunneling;  interfaces;  tunnel junctions;  trapezoidal barrier parameters
分类号:
O 484.4+ 3; O 484.3
文献标志码:
A
摘要:
用梯形势垒模型计算偏置Al- Al2O3-铁磁金属(Fe, Co, Ni和Ni80Fe20)隧道结的I-V曲线,通过与结在77 K温度下的实验I-V曲线拟合决定了结的势垒参数.拟合结果表明,对于上电极为不同铁磁金属的4种结, Al-Al2O3界面处的势垒高度差别很小,而Al2O3-Fe(-Co,-Ni,-Ni80Fe20)界面处的势垒高度以及势垒宽度则分别为1.72 eV, 1.76 eV, 1.86 eV, 1.69 eV以及17.60 , 11.22 , 12.28 , 13.40 .势垒高度和宽度因铁磁金属上电极不同而改变的现象可归因为铁磁金属原子向Al2O3势垒层渗透,以及在界面区域铁磁金属原子与Al2O3的氧化反应导致附加氧化势垒层的形成.
Abstract:
A trapezoidal barrier potential was used to model Al-Al2O3-ferromagnetic metal(Fe, Co, Ni and Ni80Fe20) biased tunnel junctions. By fitting the calculated I-V curves to the experimental ones at 77 K, the barrier height 1at the Al- Al2O3 interfaces of the four different junctions were determined to be close to each other, the barrier height 2at the Al2O3-Fe(-Co,-Ni,-Ni80Fe20) interface is 1.72 eV,1.76 eV,1.86 eV,1.69 eV and the barrier width d for the Fe-(Co-, Ni-, Ni80Fe20-) junction is 17.60 , 11.22 , 12.28 , 13.40 , respectively. The variation in the barrier height and width with the ferromagnetic electrodes can be attributed to the ferromagnetic atom diffusion into the Al2O3 barrier layers and the formation of an additional oxide barrier layer due to the oxidation reaction between the ferromagnetic atoms and the Al2O3 in the interface region.

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更新日期/Last Update: 2015-12-11