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

Hoang Yen Thi Nguyen, Hyunjung Yi, Sung Jung Joo, Kyung Ho Shin, Kyoung Jin Lee, Bernard Dieny

Research output: Contribution to journalArticle

7 Citations (Scopus)

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 (4 × 10 6 A/cm2) is one order lower and the resistance change (2.78 mΩ μm2) 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.

Original languageEnglish
Article number094103
JournalApplied Physics Letters
Volume89
Issue number9
DOIs
Publication statusPublished - 2006 Sep 8

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spin exchange
polarizers
current density
oxides
torque
low resistance
high current
magnetization
augmentation
polarization

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Exchange biased spin polarizer with an embedded nano-oxide layer for a substantially lower switching current density. / Nguyen, Hoang Yen Thi; Yi, Hyunjung; Joo, Sung Jung; Shin, Kyung Ho; Lee, Kyoung Jin; Dieny, Bernard.

In: Applied Physics Letters, Vol. 89, No. 9, 094103, 08.09.2006.

Research output: Contribution to journalArticle

Nguyen, Hoang Yen Thi ; Yi, Hyunjung ; Joo, Sung Jung ; Shin, Kyung Ho ; Lee, Kyoung Jin ; Dieny, Bernard. / Exchange biased spin polarizer with an embedded nano-oxide layer for a substantially lower switching current density. In: Applied Physics Letters. 2006 ; Vol. 89, No. 9.
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