Exchange biased spin polarizer with an embedded nano-oxide layer for a substantially lower switching current density

Authors
Nguyen, Hoang Yen ThiYi, HyunjungJoo, Sung-JungShin, Kyung-HoLee, Kyung-JinDieny, Bernard
Issue Date
2006-08-28
Publisher
AMER INST PHYSICS
Citation
APPLIED PHYSICS LETTERS, v.89, no.9
Abstract
The authors demonstrate that the spin polarizer in the form of an exchange biased ferromagnetic lead with an embedded nano-oxide layer can greatly enhance the spin transfer torque for the current induced magnetization switching. By applying it in spin valves, the switching current density (4x10(6) A/cm(2)) is one order lower and the resistance change (2.78 m Omega mu m(2)) is three times higher than those gotten by using a simple spin polarizer. This spin torque enhancement is attributed to the exchange bias pinning acting on the polarizer (the fixed layer) with effective support of the nano-oxide layer, which together lead to a much higher current spin polarization. (c) 2006 American Institute of Physics.
Keywords
DRIVEN; DRIVEN; exchange-bias; nano-oxide layer; CIMS
ISSN
0003-6951
URI
https://pubs.kist.re.kr/handle/201004/135231
DOI
10.1063/1.2337532
Appears in Collections:
KIST Article > 2006
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