Current-Induced Magnetization Switching of CoFeB/Ta/[Co/Pd (Pt)]-Multilayers in Magnetic Tunnel Junctions with Perpendicular Anisotropy

Shinya Ishikawa; Eli C.I. Enobio; Hideo Sato; Shunsuke Fukami; Fumihiro Matsukura; Hideo Ohno

doi:10.1109/TMAG.2016.2517098

Current-Induced Magnetization Switching of CoFeB/Ta/[Co/Pd (Pt)]-Multilayers in Magnetic Tunnel Junctions with Perpendicular Anisotropy

Shinya Ishikawa, Eli C.I. Enobio, Hideo Sato, Shunsuke Fukami, Fumihiro Matsukura, Hideo Ohno

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

5 Citations (Scopus)

Abstract

We investigate magnetic properties of CoFeB/Ta/[Co/Pd (Pt)] multilayers and properties of magnetic tunnel junctions (MTJs) with the structures as a recording layer. CoFeB/Ta/[Co/Pd] multilayer shows a lower damping constant α than that of CoFeB/Ta/[Co/Pt] multilayer. We evaluate current-induced magnetization switching (CIMS) properties of the MTJs with CoFeB/Ta/[Co/Pd (Pt)] multilayers with the junction diameter of 15 (13) nm that show similar thermal stability factor. CIMS is observed for the MTJ with a CoFeB/Ta/[Co/Pd] multilayer at zero magnetic field, whereas it is observed for the MTJ with the CoFeB/Ta/[Co/Pt] multilayer only in the presence of an external field.

Original language	English
Article number	7378992
Journal	IEEE Transactions on Magnetics
Volume	52
Issue number	7
DOIs	https://doi.org/10.1109/TMAG.2016.2517098
Publication status	Published - 2016 Jul

Keywords

Magnetic tunnel junction
Spintronics
multilayer
perpendicular magnetic anisotropy

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/TMAG.2016.2517098

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title = "Current-Induced Magnetization Switching of CoFeB/Ta/[Co/Pd (Pt)]-Multilayers in Magnetic Tunnel Junctions with Perpendicular Anisotropy",

abstract = "We investigate magnetic properties of CoFeB/Ta/[Co/Pd (Pt)] multilayers and properties of magnetic tunnel junctions (MTJs) with the structures as a recording layer. CoFeB/Ta/[Co/Pd] multilayer shows a lower damping constant α than that of CoFeB/Ta/[Co/Pt] multilayer. We evaluate current-induced magnetization switching (CIMS) properties of the MTJs with CoFeB/Ta/[Co/Pd (Pt)] multilayers with the junction diameter of 15 (13) nm that show similar thermal stability factor. CIMS is observed for the MTJ with a CoFeB/Ta/[Co/Pd] multilayer at zero magnetic field, whereas it is observed for the MTJ with the CoFeB/Ta/[Co/Pt] multilayer only in the presence of an external field.",

keywords = "Magnetic tunnel junction, Spintronics, multilayer, perpendicular magnetic anisotropy",

author = "Shinya Ishikawa and Enobio, {Eli C.I.} and Hideo Sato and Shunsuke Fukami and Fumihiro Matsukura and Hideo Ohno",

note = "Publisher Copyright: {\textcopyright} 2016 IEEE.",

year = "2016",

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doi = "10.1109/TMAG.2016.2517098",

language = "English",

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T1 - Current-Induced Magnetization Switching of CoFeB/Ta/[Co/Pd (Pt)]-Multilayers in Magnetic Tunnel Junctions with Perpendicular Anisotropy

AU - Ishikawa, Shinya

AU - Enobio, Eli C.I.

AU - Sato, Hideo

AU - Fukami, Shunsuke

AU - Matsukura, Fumihiro

AU - Ohno, Hideo

PY - 2016/7

Y1 - 2016/7

N2 - We investigate magnetic properties of CoFeB/Ta/[Co/Pd (Pt)] multilayers and properties of magnetic tunnel junctions (MTJs) with the structures as a recording layer. CoFeB/Ta/[Co/Pd] multilayer shows a lower damping constant α than that of CoFeB/Ta/[Co/Pt] multilayer. We evaluate current-induced magnetization switching (CIMS) properties of the MTJs with CoFeB/Ta/[Co/Pd (Pt)] multilayers with the junction diameter of 15 (13) nm that show similar thermal stability factor. CIMS is observed for the MTJ with a CoFeB/Ta/[Co/Pd] multilayer at zero magnetic field, whereas it is observed for the MTJ with the CoFeB/Ta/[Co/Pt] multilayer only in the presence of an external field.

AB - We investigate magnetic properties of CoFeB/Ta/[Co/Pd (Pt)] multilayers and properties of magnetic tunnel junctions (MTJs) with the structures as a recording layer. CoFeB/Ta/[Co/Pd] multilayer shows a lower damping constant α than that of CoFeB/Ta/[Co/Pt] multilayer. We evaluate current-induced magnetization switching (CIMS) properties of the MTJs with CoFeB/Ta/[Co/Pd (Pt)] multilayers with the junction diameter of 15 (13) nm that show similar thermal stability factor. CIMS is observed for the MTJ with a CoFeB/Ta/[Co/Pd] multilayer at zero magnetic field, whereas it is observed for the MTJ with the CoFeB/Ta/[Co/Pt] multilayer only in the presence of an external field.

KW - Magnetic tunnel junction

KW - Spintronics

KW - multilayer

KW - perpendicular magnetic anisotropy

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Current-Induced Magnetization Switching of CoFeB/Ta/[Co/Pd (Pt)]-Multilayers in Magnetic Tunnel Junctions with Perpendicular Anisotropy

Abstract

Keywords

ASJC Scopus subject areas

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