Spin transfer in antisymmetric exchange-biased spin-valves

被引:14
|
作者
Jiang, Y [1 ]
Yu, GH
Wang, YB
Teng, J
Ochiai, T
Tezuka, N
Inomata, K
机构
[1] Univ Sci & Technol Beijing, Dept Mat Phys & Chem, Beijing 100083, Peoples R China
[2] Tohoku Univ, Grad Sch Engn, Dept Mat Sci, Sendai, Miyagi 9808579, Japan
[3] Japan Sci & Technol Agcy, CREST, Kawagoe, Saitama 3320012, Japan
关键词
D O I
10.1063/1.1927694
中图分类号
O59 [应用物理学];
学科分类号
摘要
In this letter, we report on measurements of current-induced magnetization switching (CIMS) in current-perpendicular-to-plane exchange-biased spin-valves (ESPVs). The structures of the ESPVs are all "antisymmetric" but with different thickness of a ruthenium (Ru) layer. It is confirmed that the "antisymmetric" structures largely enhance the spin transfer effect and therefore reduce critical current densities for the CIMS. The effect of the Ru layer on the spin transfer in the ESPVs is also systematically studied. With a decrease of the Ru layer's thickness, the critical current densities can be further reduced. The lowest critical current we achieved in an "antisymmetric" structure is 1 x 10(6) A/cm(2), which realizes a reduction of more than one order of magnitude compared with all the reported works. (c) 2005 American Institute of Physics.
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页码:1 / 3
页数:3
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