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 journalArticlepeer-review

8 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

Bibliographical note

Funding Information:
The authors thank J. Bass for very useful discussions. This work was supported by the TND Frontier Project, funded by KISTEP, by the Korea Institute of Science and Technology Vision 21 Program, and by the Ministry of Science and Technology of Korea through the Cavendish-KAIST Cooperative Research Program.

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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