Microwave-Assisted Magnetization Reversal of Exchange-Coupled Composite Nanopillar with Large Gilbert Damping Constant

Terumitsu Tanaka; Shota Kashiwagi; Yuto Otsuka; Yukio Nozaki; Yang Ki Hong; Kimihide Matsuyama

doi:10.1109/TMAG.2013.2297156

Microwave-Assisted Magnetization Reversal of Exchange-Coupled Composite Nanopillar with Large Gilbert Damping Constant

Terumitsu Tanaka, Shota Kashiwagi, Yuto Otsuka, Yukio Nozaki, Yang Ki Hong, Kimihide Matsuyama

Department of Physics

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

10 Citations (Scopus)

Abstract

Microwave-assisted magnetization reversal (MAMR) characteristics of a single-exchange-coupled composite nanopillar, which consists of ferromagnetically coupled soft and hard magnetic sections, have been discussed in terms of Gilbert damping constant using micromagnetic simulation. The results indicate the occurrence of significant MAMR even when the damping constant of the hard magnetic section is large. The results obtained in this paper greatly contrast those obtained with single-phase hard magnetic pillars. We also found that the magnetization switching time tends to be shorter when the damping constant of the hard magnetic section is large.

Original language	English
Article number	6832785
Journal	IEEE Transactions on Magnetics
Volume	50
Issue number	6
DOIs	https://doi.org/10.1109/TMAG.2013.2297156
Publication status	Published - 2014 Jun 1

Keywords

Damping
Magnetic resonance
Magnetization
Magnetomechanical effects
Perpendicular magnetic anisotropy
Soft magnetic materials

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/TMAG.2013.2297156

Cite this

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title = "Microwave-Assisted Magnetization Reversal of Exchange-Coupled Composite Nanopillar with Large Gilbert Damping Constant",

abstract = "Microwave-assisted magnetization reversal (MAMR) characteristics of a single-exchange-coupled composite nanopillar, which consists of ferromagnetically coupled soft and hard magnetic sections, have been discussed in terms of Gilbert damping constant using micromagnetic simulation. The results indicate the occurrence of significant MAMR even when the damping constant of the hard magnetic section is large. The results obtained in this paper greatly contrast those obtained with single-phase hard magnetic pillars. We also found that the magnetization switching time tends to be shorter when the damping constant of the hard magnetic section is large.",

keywords = "Damping, Magnetic resonance, Magnetization, Magnetomechanical effects, Perpendicular magnetic anisotropy, Soft magnetic materials",

author = "Terumitsu Tanaka and Shota Kashiwagi and Yuto Otsuka and Yukio Nozaki and Hong, {Yang Ki} and Kimihide Matsuyama",

note = "Funding Information: This work was supported by the Storage Research Consortium. Publisher Copyright: {\textcopyright} 2015 IEEE.",

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T1 - Microwave-Assisted Magnetization Reversal of Exchange-Coupled Composite Nanopillar with Large Gilbert Damping Constant

AU - Tanaka, Terumitsu

AU - Kashiwagi, Shota

AU - Otsuka, Yuto

AU - Nozaki, Yukio

AU - Hong, Yang Ki

AU - Matsuyama, Kimihide

PY - 2014/6/1

Y1 - 2014/6/1

N2 - Microwave-assisted magnetization reversal (MAMR) characteristics of a single-exchange-coupled composite nanopillar, which consists of ferromagnetically coupled soft and hard magnetic sections, have been discussed in terms of Gilbert damping constant using micromagnetic simulation. The results indicate the occurrence of significant MAMR even when the damping constant of the hard magnetic section is large. The results obtained in this paper greatly contrast those obtained with single-phase hard magnetic pillars. We also found that the magnetization switching time tends to be shorter when the damping constant of the hard magnetic section is large.

AB - Microwave-assisted magnetization reversal (MAMR) characteristics of a single-exchange-coupled composite nanopillar, which consists of ferromagnetically coupled soft and hard magnetic sections, have been discussed in terms of Gilbert damping constant using micromagnetic simulation. The results indicate the occurrence of significant MAMR even when the damping constant of the hard magnetic section is large. The results obtained in this paper greatly contrast those obtained with single-phase hard magnetic pillars. We also found that the magnetization switching time tends to be shorter when the damping constant of the hard magnetic section is large.

KW - Damping

KW - Magnetic resonance

KW - Magnetization

KW - Magnetomechanical effects

KW - Perpendicular magnetic anisotropy

KW - Soft magnetic materials

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Microwave-Assisted Magnetization Reversal of Exchange-Coupled Composite Nanopillar with Large Gilbert Damping Constant

Abstract

Keywords

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