Phase diagram of magnetization switching in a nanostructured magnetic thin film

Jong Min Lee, Sang Ho Lim

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The magnetization switching behavior in a nanostructured magnetic thin film, under combined in-plane fields along the longitudinal and the transverse directions, is investigated both analytically and numerically. Two critical curves under a static and a dynamic condition are calculated analytically by using an equation for the total energy. The analytically calculated critical curves are compared with the micromagnetic simulation results for the switching phase diagrams of nonswitching, incoherent switching, and coherent switching. The comparison indicates that the dynamic critical curve is the boundary separating the nonswitching from the incoherent switching, while the static critical curve acts as the boundary between the incoherent switching and the coherent switching. The present results indicate that the switching phase diagram can be constructed analytically with the use of a total energy equation. The analytically calculated critical curves are less accurate in the presence of the simplifying assumptions of a single and in-plane domain state for a small angle between the applied magnetic field and the easy axis. In this case, an accurate value of the anisotropy energy, an input to the total energy equation, must be accurately estimated by micromagnetic simulation.

Original languageEnglish
Article number073910
JournalJournal of Applied Physics
Volume108
Issue number7
DOIs
Publication statusPublished - 2010 Oct 1

Fingerprint

phase diagrams
magnetization
thin films
curves
energy
simulation
anisotropy
magnetic fields

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Phase diagram of magnetization switching in a nanostructured magnetic thin film. / Lee, Jong Min; Lim, Sang Ho.

In: Journal of Applied Physics, Vol. 108, No. 7, 073910, 01.10.2010.

Research output: Contribution to journalArticle

@article{3ca0b0f80f884253814e01bf0e0faf42,
title = "Phase diagram of magnetization switching in a nanostructured magnetic thin film",
abstract = "The magnetization switching behavior in a nanostructured magnetic thin film, under combined in-plane fields along the longitudinal and the transverse directions, is investigated both analytically and numerically. Two critical curves under a static and a dynamic condition are calculated analytically by using an equation for the total energy. The analytically calculated critical curves are compared with the micromagnetic simulation results for the switching phase diagrams of nonswitching, incoherent switching, and coherent switching. The comparison indicates that the dynamic critical curve is the boundary separating the nonswitching from the incoherent switching, while the static critical curve acts as the boundary between the incoherent switching and the coherent switching. The present results indicate that the switching phase diagram can be constructed analytically with the use of a total energy equation. The analytically calculated critical curves are less accurate in the presence of the simplifying assumptions of a single and in-plane domain state for a small angle between the applied magnetic field and the easy axis. In this case, an accurate value of the anisotropy energy, an input to the total energy equation, must be accurately estimated by micromagnetic simulation.",
author = "Lee, {Jong Min} and Lim, {Sang Ho}",
year = "2010",
month = "10",
day = "1",
doi = "10.1063/1.3484047",
language = "English",
volume = "108",
journal = "Journal of Applied Physics",
issn = "0021-8979",
publisher = "American Institute of Physics Publising LLC",
number = "7",

}

TY - JOUR

T1 - Phase diagram of magnetization switching in a nanostructured magnetic thin film

AU - Lee, Jong Min

AU - Lim, Sang Ho

PY - 2010/10/1

Y1 - 2010/10/1

N2 - The magnetization switching behavior in a nanostructured magnetic thin film, under combined in-plane fields along the longitudinal and the transverse directions, is investigated both analytically and numerically. Two critical curves under a static and a dynamic condition are calculated analytically by using an equation for the total energy. The analytically calculated critical curves are compared with the micromagnetic simulation results for the switching phase diagrams of nonswitching, incoherent switching, and coherent switching. The comparison indicates that the dynamic critical curve is the boundary separating the nonswitching from the incoherent switching, while the static critical curve acts as the boundary between the incoherent switching and the coherent switching. The present results indicate that the switching phase diagram can be constructed analytically with the use of a total energy equation. The analytically calculated critical curves are less accurate in the presence of the simplifying assumptions of a single and in-plane domain state for a small angle between the applied magnetic field and the easy axis. In this case, an accurate value of the anisotropy energy, an input to the total energy equation, must be accurately estimated by micromagnetic simulation.

AB - The magnetization switching behavior in a nanostructured magnetic thin film, under combined in-plane fields along the longitudinal and the transverse directions, is investigated both analytically and numerically. Two critical curves under a static and a dynamic condition are calculated analytically by using an equation for the total energy. The analytically calculated critical curves are compared with the micromagnetic simulation results for the switching phase diagrams of nonswitching, incoherent switching, and coherent switching. The comparison indicates that the dynamic critical curve is the boundary separating the nonswitching from the incoherent switching, while the static critical curve acts as the boundary between the incoherent switching and the coherent switching. The present results indicate that the switching phase diagram can be constructed analytically with the use of a total energy equation. The analytically calculated critical curves are less accurate in the presence of the simplifying assumptions of a single and in-plane domain state for a small angle between the applied magnetic field and the easy axis. In this case, an accurate value of the anisotropy energy, an input to the total energy equation, must be accurately estimated by micromagnetic simulation.

UR - http://www.scopus.com/inward/record.url?scp=77958154717&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77958154717&partnerID=8YFLogxK

U2 - 10.1063/1.3484047

DO - 10.1063/1.3484047

M3 - Article

AN - SCOPUS:77958154717

VL - 108

JO - Journal of Applied Physics

JF - Journal of Applied Physics

SN - 0021-8979

IS - 7

M1 - 073910

ER -