Current-induced magnetic switching in nanopillar spin-valve systems with double free layers

Jae Chul Lee; Chun Yeol You; Sug Bong Choe; Kyung Jin Lee; Kyung Ho Shin

doi:10.1063/1.2714314

Current-induced magnetic switching in nanopillar spin-valve systems with double free layers

Jae Chul Lee, Chun Yeol You, Sug Bong Choe, Kyung Jin Lee, Kyung Ho Shin

Department of Materials Science and Engineering

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

1 Citation (Scopus)

Abstract

Double soft ferromagnetic layers- CoFePdCoFe -were employed as a free layer of nanopillar spin valve. The system showed double jumps in electric resistance with respect to the spin current. Each jump corresponds to the switching of one of the CoFe layers in the double free layer. The absolute change in resistance of each jump is the same in the resistance versus current scans taken at different applied field values. While both jumps are present only in larger fields, only one jump is observed in low fields, which is attributed to the reversal of the inner CoFe layer. Furthermore, in the latter case an inversion of the hysteresis has been observed, which is explained by telegraph noise.

Original language	English
Article number	09A512
Journal	Journal of Applied Physics
Volume	101
Issue number	9
DOIs	https://doi.org/10.1063/1.2714314
Publication status	Published - 2007

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1063/1.2714314

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@article{afa3ea1090074b3b928b04b93574f5f6,

title = "Current-induced magnetic switching in nanopillar spin-valve systems with double free layers",

abstract = "Double soft ferromagnetic layers- CoFePdCoFe -were employed as a free layer of nanopillar spin valve. The system showed double jumps in electric resistance with respect to the spin current. Each jump corresponds to the switching of one of the CoFe layers in the double free layer. The absolute change in resistance of each jump is the same in the resistance versus current scans taken at different applied field values. While both jumps are present only in larger fields, only one jump is observed in low fields, which is attributed to the reversal of the inner CoFe layer. Furthermore, in the latter case an inversion of the hysteresis has been observed, which is explained by telegraph noise.",

author = "Lee, {Jae Chul} and You, {Chun Yeol} and Choe, {Sug Bong} and Lee, {Kyung Jin} and Shin, {Kyung Ho}",

note = "Funding Information: 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. One of the authors (S.-B.C.) was supported by the Korea Science and Engineering Foundation (2005-02172). Another author (C.-Y.Y.) was supported by the Korea Research Foundation Grant funded by the Korean Government (MOEHRD) (KRF-2005-070-C00053). Another author (K.J.L.) was supported by a National Research Laboratory program. ",

year = "2007",

doi = "10.1063/1.2714314",

language = "English",

volume = "101",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics Publising LLC",

number = "9",

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TY - JOUR

T1 - Current-induced magnetic switching in nanopillar spin-valve systems with double free layers

AU - Lee, Jae Chul

AU - You, Chun Yeol

AU - Choe, Sug Bong

AU - Lee, Kyung Jin

AU - Shin, Kyung Ho

N1 - Funding Information: 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. One of the authors (S.-B.C.) was supported by the Korea Science and Engineering Foundation (2005-02172). Another author (C.-Y.Y.) was supported by the Korea Research Foundation Grant funded by the Korean Government (MOEHRD) (KRF-2005-070-C00053). Another author (K.J.L.) was supported by a National Research Laboratory program.

PY - 2007

Y1 - 2007

N2 - Double soft ferromagnetic layers- CoFePdCoFe -were employed as a free layer of nanopillar spin valve. The system showed double jumps in electric resistance with respect to the spin current. Each jump corresponds to the switching of one of the CoFe layers in the double free layer. The absolute change in resistance of each jump is the same in the resistance versus current scans taken at different applied field values. While both jumps are present only in larger fields, only one jump is observed in low fields, which is attributed to the reversal of the inner CoFe layer. Furthermore, in the latter case an inversion of the hysteresis has been observed, which is explained by telegraph noise.

AB - Double soft ferromagnetic layers- CoFePdCoFe -were employed as a free layer of nanopillar spin valve. The system showed double jumps in electric resistance with respect to the spin current. Each jump corresponds to the switching of one of the CoFe layers in the double free layer. The absolute change in resistance of each jump is the same in the resistance versus current scans taken at different applied field values. While both jumps are present only in larger fields, only one jump is observed in low fields, which is attributed to the reversal of the inner CoFe layer. Furthermore, in the latter case an inversion of the hysteresis has been observed, which is explained by telegraph noise.

UR - http://www.scopus.com/inward/record.url?scp=34248530670&partnerID=8YFLogxK

U2 - 10.1063/1.2714314

DO - 10.1063/1.2714314

M3 - Article

AN - SCOPUS:34248530670

SN - 0021-8979

VL - 101

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 9

M1 - 09A512

ER -

Current-induced magnetic switching in nanopillar spin-valve systems with double free layers

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