Effect of material parameters on magnetization process in microstructured thin film

K. Matsuyama, F. Nakamura, Yukio Nozaki

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Effects of material parameters on the magnetization process in a sub-micron strip pattern have been studied by micromagnetic simulations. A grain structure in the thin film is modeled by a discretized square element array. A structural parameter is introduced considering discontinuous film structure. The exchange stiffness is also varied as parameters. Simulated transverse susceptibility χ and the longitudinal magnetization reversal field Hrev in continuous film structure are somewhat smaller than the analytical predictions based on the coherent rotation model. The values of χ and Hrev significantly decrease with the decrease of inter-grain coupling due to discontinuous structure. Numerical analysis for transients of the internal energy during the magnetization process reveals that the demagnetizing term dominates the transverse magnetization process. While, the demagnetizing and exchange energy terms comparatively contribute to the potential barrier for the longitudinal magnetization reversal. Various types of micromagnetic configurations of edge-curl, buckling and vortex were observed in the magnetization reversal depending on the material parameters.

Original languageEnglish
Pages (from-to)248-250
Number of pages3
JournalJournal of Magnetism and Magnetic Materials
Volume198
DOIs
Publication statusPublished - 1999 Jun 1
Externally publishedYes

Fingerprint

Magnetization reversal
Magnetization
Thin films
magnetization
thin films
Crystal microstructure
Buckling
Numerical analysis
Vortex flow
Stiffness
buckling
internal energy
numerical analysis
strip
stiffness
energy transfer
vortices
magnetic permeability
configurations
predictions

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Effect of material parameters on magnetization process in microstructured thin film. / Matsuyama, K.; Nakamura, F.; Nozaki, Yukio.

In: Journal of Magnetism and Magnetic Materials, Vol. 198, 01.06.1999, p. 248-250.

Research output: Contribution to journalArticle

@article{6dde071b75214512afb77c340ecd6ce5,
title = "Effect of material parameters on magnetization process in microstructured thin film",
abstract = "Effects of material parameters on the magnetization process in a sub-micron strip pattern have been studied by micromagnetic simulations. A grain structure in the thin film is modeled by a discretized square element array. A structural parameter is introduced considering discontinuous film structure. The exchange stiffness is also varied as parameters. Simulated transverse susceptibility χ and the longitudinal magnetization reversal field Hrev in continuous film structure are somewhat smaller than the analytical predictions based on the coherent rotation model. The values of χ and Hrev significantly decrease with the decrease of inter-grain coupling due to discontinuous structure. Numerical analysis for transients of the internal energy during the magnetization process reveals that the demagnetizing term dominates the transverse magnetization process. While, the demagnetizing and exchange energy terms comparatively contribute to the potential barrier for the longitudinal magnetization reversal. Various types of micromagnetic configurations of edge-curl, buckling and vortex were observed in the magnetization reversal depending on the material parameters.",
author = "K. Matsuyama and F. Nakamura and Yukio Nozaki",
year = "1999",
month = "6",
day = "1",
doi = "10.1016/S0304-8853(98)01096-8",
language = "English",
volume = "198",
pages = "248--250",
journal = "Journal of Magnetism and Magnetic Materials",
issn = "0304-8853",
publisher = "Elsevier",

}

TY - JOUR

T1 - Effect of material parameters on magnetization process in microstructured thin film

AU - Matsuyama, K.

AU - Nakamura, F.

AU - Nozaki, Yukio

PY - 1999/6/1

Y1 - 1999/6/1

N2 - Effects of material parameters on the magnetization process in a sub-micron strip pattern have been studied by micromagnetic simulations. A grain structure in the thin film is modeled by a discretized square element array. A structural parameter is introduced considering discontinuous film structure. The exchange stiffness is also varied as parameters. Simulated transverse susceptibility χ and the longitudinal magnetization reversal field Hrev in continuous film structure are somewhat smaller than the analytical predictions based on the coherent rotation model. The values of χ and Hrev significantly decrease with the decrease of inter-grain coupling due to discontinuous structure. Numerical analysis for transients of the internal energy during the magnetization process reveals that the demagnetizing term dominates the transverse magnetization process. While, the demagnetizing and exchange energy terms comparatively contribute to the potential barrier for the longitudinal magnetization reversal. Various types of micromagnetic configurations of edge-curl, buckling and vortex were observed in the magnetization reversal depending on the material parameters.

AB - Effects of material parameters on the magnetization process in a sub-micron strip pattern have been studied by micromagnetic simulations. A grain structure in the thin film is modeled by a discretized square element array. A structural parameter is introduced considering discontinuous film structure. The exchange stiffness is also varied as parameters. Simulated transverse susceptibility χ and the longitudinal magnetization reversal field Hrev in continuous film structure are somewhat smaller than the analytical predictions based on the coherent rotation model. The values of χ and Hrev significantly decrease with the decrease of inter-grain coupling due to discontinuous structure. Numerical analysis for transients of the internal energy during the magnetization process reveals that the demagnetizing term dominates the transverse magnetization process. While, the demagnetizing and exchange energy terms comparatively contribute to the potential barrier for the longitudinal magnetization reversal. Various types of micromagnetic configurations of edge-curl, buckling and vortex were observed in the magnetization reversal depending on the material parameters.

UR - http://www.scopus.com/inward/record.url?scp=0032656609&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0032656609&partnerID=8YFLogxK

U2 - 10.1016/S0304-8853(98)01096-8

DO - 10.1016/S0304-8853(98)01096-8

M3 - Article

VL - 198

SP - 248

EP - 250

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

SN - 0304-8853

ER -