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, Kyung 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

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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