Reduction in critical current of current-induced switching in exchange-biased spin valves

Authors
Nguyen, THYYi, HJJoo, SJLee, JHShin, KHKim, TW
Issue Date
2005-05-15
Publisher
AMER INST PHYSICS
Citation
JOURNAL OF APPLIED PHYSICS, v.97, no.10
Abstract
The current-induced magnetization reversal (CIMR) effect in nanosized exchange-biased spin valves (EBS) of IrMn/Co(1)/Cu/Co(2) is investigated. The CIMR is studied at RT. With our EBS structure, the critical current can be lowered to 7.5 X 10(6) A/cm(2), which is rather smaller than that in the conventional simple spin valves (SS) Co(1)/Cu/Co(2). This effect can be attributed to the enhancement of spin transfer efficiency by using antiferromagnetic pinning layer in that structure. However, the absolute change in total resistance of EBS, in comparison to that of SS with similar layer thickness, is not increased, as the nearly unpatterned fixed Co layer is pinned. The results are discussed in terms of current induced spin transfer and current induced thermal activation. (c) 2005 American Institute of Physics.
Keywords
TUNNEL-JUNCTIONS; TUNNEL-JUNCTIONS; current-driven; exchange-biased; spin valve
ISSN
0021-8979
URI
https://pubs.kist.re.kr/handle/201004/136469
DOI
10.1063/1.1853279
Appears in Collections:
KIST Article > 2005
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