Dead Layer in a Ta/Ni81 Fe19 /Ta Structure
YU Guang-Hua1,2 , REN Ting-Ting1 , LI Ming-Hua1,2 , ZHU Feng-Wu1 , JIANG Huang-Wei2 , LAI Wu-Yan2
1 Department of Materials Physics, University of Science and Technology Beijing, Beijing 100083
2 Institute of Physics, Chinese Academy of Sciences, Beijing 100080
Dead Layer in a Ta/Ni81 Fe19 /Ta Structure
YU Guang-Hua1,2 ;REN Ting-Ting1 ;LI Ming-Hua1,2 ;ZHU Feng-Wu1 ;JIANG Huang-Wei2 ;LAI Wu-Yan2
1 Department of Materials Physics, University of Science and Technology Beijing, Beijing 100083
2 Institute of Physics, Chinese Academy of Sciences, Beijing 100080
关键词 ：
75.70.Cn ,
82.80.Pv
Abstract ： Effect of Ta seed layers and Ta cap layers on the effective magnetic thickness of ultrathin permalloy (Ni81 Fe19 ) was experimentally investigated for magnetic random access memory applications. The films were deposited by magnetron sputtering. For a Ta/Ni81 Fe19 /Ta fundamental structure, Ta seed and Ta cap layers resulted in a loss of moment equivalent to a magnetically dead layer of thickness 1.6±0.2nm. In order to find the mechanism, the composition and chemical states at the interface regions of Ta/Ni81 Fe19 and Ni81 Fe19 /Ta were studied using the x-ray photoelectron spectroscopy and peak decomposition technique. The results show that there are thermodynamically favorable reactions at the Ta/Ni81 Fe19 and Ni81 Fe19 /Ta interfaces: 2Ta+Ni=NiTa2 .
Key words ：
75.70.Cn
82.80.Pv
出版日期: 2002-09-01
:
75.70.Cn
(Magnetic properties of interfaces (multilayers, superlattices, heterostructures))
82.80.Pv
(Electron spectroscopy (X-ray photoelectron (XPS), Auger electron spectroscopy (AES), etc.))
引用本文:
YU Guang-Hua;REN Ting-Ting;LI Ming-Hua;ZHU Feng-Wu;JIANG Huang-Wei;LAI Wu-Yan. Dead Layer in a Ta/Ni81 Fe19 /Ta Structure[J]. 中国物理快报, 2002, 19(9): 1347-1349.
81 Fe19 /Ta Structure. Chin. Phys. Lett., 2002, 19(9): 1347-1349.
链接本文:
https://cpl.iphy.ac.cn/CN/
或
https://cpl.iphy.ac.cn/CN/Y2002/V19/I9/1347
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2002, Vol. 19 
