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

doi:10.1063/1.2337532

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

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

2 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 language	English
Article number	094103
Journal	Applied Physics Letters
Volume	89
Issue number	9
DOIs	https://doi.org/10.1063/1.2337532
Publication status	Published - 2006

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.2337532

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

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.",

author = "Nguyen, {Hoang Yen Thi} and Hyunjung Yi and Joo, {Sung Jung} and Shin, {Kyung Ho} and Lee, {Kyoung Jin} and Bernard Dieny",

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.",

year = "2006",

doi = "10.1063/1.2337532",

language = "English",

volume = "89",

journal = "Applied Physics Letters",

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T1 - Exchange biased spin polarizer with an embedded nano-oxide layer for a substantially lower switching current density

AU - Nguyen, Hoang Yen Thi

AU - Yi, Hyunjung

AU - Joo, Sung Jung

AU - Shin, Kyung Ho

AU - Lee, Kyoung Jin

AU - Dieny, Bernard

N1 - 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.

PY - 2006

Y1 - 2006

N2 - 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.

AB - 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.

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U2 - 10.1063/1.2337532

DO - 10.1063/1.2337532

M3 - Article

AN - SCOPUS:33748275275

SN - 0003-6951

VL - 89

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 9

M1 - 094103

ER -

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

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