Micromagnetic simulation of thermally assisted magnetization reversal in magnetic nanodots with perpendicular anisotropy

Budi Purnama, Yukio Nozaki, Kimihide Matsuyama

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Temporal evolution of magnetization in a field cooling process from magnetic ordering temperature has been numerically investigated for magnetic nanodots with perpendicular anisotropy by solving the stochastic Landau-Lifshitz-Gilbert equation. The magnetic field required to align the magnetization, i.e. the switching field for thermally assisted writing of magnetic dot, depends on not only the intrinsic anisotropy field but also the magnetization reversal mechanism. To minimize the switching field with ensuring a practical thermal stability of the dot for nonvolatile memory applications, the lateral dimension of the dot should be smaller than its critical size for single domain configuration to avoid a formation of flux closure configuration inside the dot.

Original languageEnglish
Pages (from-to)2683-2685
Number of pages3
JournalJournal of Magnetism and Magnetic Materials
Volume310
Issue number2 SUPPL. PART 3
DOIs
Publication statusPublished - 2007 Mar
Externally publishedYes

Fingerprint

Magnetization reversal
Magnetization
Anisotropy
magnetization
anisotropy
simulation
configurations
closures
Thermodynamic stability
thermal stability
Magnetic fields
Fluxes
Cooling
cooling
Data storage equipment
magnetic fields
Temperature
temperature

Keywords

  • Magnetization reversal
  • Nanodot magnetic
  • Numerical simulation
  • Perpendicular anisotropy
  • Thermally assisted

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Micromagnetic simulation of thermally assisted magnetization reversal in magnetic nanodots with perpendicular anisotropy. / Purnama, Budi; Nozaki, Yukio; Matsuyama, Kimihide.

In: Journal of Magnetism and Magnetic Materials, Vol. 310, No. 2 SUPPL. PART 3, 03.2007, p. 2683-2685.

Research output: Contribution to journalArticle

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