Switching phase diagrams of current-induced magnetization switching in asymmetric MgO-based magnetic tunnel junctions

Seung Young Park; Jae Ho Han; Se Chung Oh; Jang Eun Lee; Kyung Tae Nam; Hyun Woo Lee; Younghun Jo; Kyung Jin Lee

doi:10.1088/0022-3727/44/6/064008

Switching phase diagrams of current-induced magnetization switching in asymmetric MgO-based magnetic tunnel junctions

Seung Young Park, Jae Ho Han, Se Chung Oh, Jang Eun Lee, Kyung Tae Nam, Hyun Woo Lee, Younghun Jo, Kyung Jin Lee

Department of Materials Science and Engineering

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

4 Citations (Scopus)

Abstract

We investigated the effect of the free-layer composition and the pattern size of magnetic cell on current-induced magnetization switching in asymmetric MgO-based magnetic tunnel junctions. We found that the normalized switching phase diagrams (SPDs) measured at low temperature are mostly determined by the material composition of ferromagnetic electrodes but are not much sensitive to the intrinsic energy barrier and the anisotropy field of the sample. This experimental result indicates that the normalized SPD can be used to study the fundamental characteristics of spin-transfer torque.

Original language	English
Article number	064008
Journal	Journal of Physics D: Applied Physics
Volume	44
Issue number	6
DOIs	https://doi.org/10.1088/0022-3727/44/6/064008
Publication status	Published - 2011 Feb 16

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Acoustics and Ultrasonics
Surfaces, Coatings and Films

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10.1088/0022-3727/44/6/064008

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abstract = "We investigated the effect of the free-layer composition and the pattern size of magnetic cell on current-induced magnetization switching in asymmetric MgO-based magnetic tunnel junctions. We found that the normalized switching phase diagrams (SPDs) measured at low temperature are mostly determined by the material composition of ferromagnetic electrodes but are not much sensitive to the intrinsic energy barrier and the anisotropy field of the sample. This experimental result indicates that the normalized SPD can be used to study the fundamental characteristics of spin-transfer torque.",

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AU - Park, Seung Young

AU - Han, Jae Ho

AU - Oh, Se Chung

AU - Lee, Jang Eun

AU - Nam, Kyung Tae

AU - Lee, Hyun Woo

AU - Jo, Younghun

AU - Lee, Kyung Jin

PY - 2011/2/16

Y1 - 2011/2/16

N2 - We investigated the effect of the free-layer composition and the pattern size of magnetic cell on current-induced magnetization switching in asymmetric MgO-based magnetic tunnel junctions. We found that the normalized switching phase diagrams (SPDs) measured at low temperature are mostly determined by the material composition of ferromagnetic electrodes but are not much sensitive to the intrinsic energy barrier and the anisotropy field of the sample. This experimental result indicates that the normalized SPD can be used to study the fundamental characteristics of spin-transfer torque.

AB - We investigated the effect of the free-layer composition and the pattern size of magnetic cell on current-induced magnetization switching in asymmetric MgO-based magnetic tunnel junctions. We found that the normalized switching phase diagrams (SPDs) measured at low temperature are mostly determined by the material composition of ferromagnetic electrodes but are not much sensitive to the intrinsic energy barrier and the anisotropy field of the sample. This experimental result indicates that the normalized SPD can be used to study the fundamental characteristics of spin-transfer torque.

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Switching phase diagrams of current-induced magnetization switching in asymmetric MgO-based magnetic tunnel junctions

Abstract

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