Critical current density for spin transfer torque switching with composite free layer structure

Chun Yeol You

doi:10.1016/j.cap.2009.11.079

Critical current density for spin transfer torque switching with composite free layer structure

Chun Yeol You

Department of Physics and Chemistry

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

15 Scopus citations

Abstract

Critical current density of composite free layer (CFL) in magnetic tunneling junction is investigated. CFL consists of two exchange coupled ferromagnetic layers, where the coupling is parallel or anti-parallel. Instability condition of the CFL under the spin transfer torque, which is related with critical current density, is obtained by analytic spin wave excitation model and confirmed by macro-spin Landau-Lifshitz-Gilbert equation. The critical current densities for the coupled two identical layers are investigated with various coupling strengths, and spin transfer torque efficiencies.

Original language	English
Pages (from-to)	952-956
Number of pages	5
Journal	Current Applied Physics
Volume	10
Issue number	3
DOIs	https://doi.org/10.1016/j.cap.2009.11.079
State	Published - May 2010

Bibliographical note

Funding Information:
This work was supported by Inha University research grant (2009). The author thanks Prof. K.-J. Lee for his helpful discussions.

Keywords

Composite free layer
Critical current density
STT-MRAM
Spin transfer torque
Synthetic ferrimagnetic layer

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10.1016/j.cap.2009.11.079

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title = "Critical current density for spin transfer torque switching with composite free layer structure",

abstract = "Critical current density of composite free layer (CFL) in magnetic tunneling junction is investigated. CFL consists of two exchange coupled ferromagnetic layers, where the coupling is parallel or anti-parallel. Instability condition of the CFL under the spin transfer torque, which is related with critical current density, is obtained by analytic spin wave excitation model and confirmed by macro-spin Landau-Lifshitz-Gilbert equation. The critical current densities for the coupled two identical layers are investigated with various coupling strengths, and spin transfer torque efficiencies.",

keywords = "Composite free layer, Critical current density, STT-MRAM, Spin transfer torque, Synthetic ferrimagnetic layer",

author = "You, \{Chun Yeol\}",

note = "Funding Information: This work was supported by Inha University research grant (2009). The author thanks Prof. K.-J. Lee for his helpful discussions.",

year = "2010",

month = may,

doi = "10.1016/j.cap.2009.11.079",

language = "English",

volume = "10",

pages = "952--956",

journal = "Current Applied Physics",

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TY - JOUR

T1 - Critical current density for spin transfer torque switching with composite free layer structure

AU - You, Chun Yeol

N1 - Funding Information: This work was supported by Inha University research grant (2009). The author thanks Prof. K.-J. Lee for his helpful discussions.

PY - 2010/5

Y1 - 2010/5

N2 - Critical current density of composite free layer (CFL) in magnetic tunneling junction is investigated. CFL consists of two exchange coupled ferromagnetic layers, where the coupling is parallel or anti-parallel. Instability condition of the CFL under the spin transfer torque, which is related with critical current density, is obtained by analytic spin wave excitation model and confirmed by macro-spin Landau-Lifshitz-Gilbert equation. The critical current densities for the coupled two identical layers are investigated with various coupling strengths, and spin transfer torque efficiencies.

AB - Critical current density of composite free layer (CFL) in magnetic tunneling junction is investigated. CFL consists of two exchange coupled ferromagnetic layers, where the coupling is parallel or anti-parallel. Instability condition of the CFL under the spin transfer torque, which is related with critical current density, is obtained by analytic spin wave excitation model and confirmed by macro-spin Landau-Lifshitz-Gilbert equation. The critical current densities for the coupled two identical layers are investigated with various coupling strengths, and spin transfer torque efficiencies.

KW - Composite free layer

KW - Critical current density

KW - STT-MRAM

KW - Spin transfer torque

KW - Synthetic ferrimagnetic layer

UR - https://www.scopus.com/pages/publications/73649117091

U2 - 10.1016/j.cap.2009.11.079

DO - 10.1016/j.cap.2009.11.079

M3 - Article

AN - SCOPUS:73649117091

SN - 1567-1739

VL - 10

SP - 952

EP - 956

JO - Current Applied Physics

JF - Current Applied Physics

IS - 3

ER -

Critical current density for spin transfer torque switching with composite free layer structure

Abstract

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Keywords

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