Thermal stability and critical switching field of nanostructured synthetic ferrimagnets

Jong Min Lee, Tae Young Lee, Sang Ho Lim

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In this study, the thermal stability and critical switching field of nanostructured elliptical synthetic ferrimagnets are calculated by using an analytical/numerical combined method, and the relationship between the two parameters is investigated. In conventional single magnetic layers, the critical switching field is a good measure of the thermal stability since the anisotropy, which determines the thermal stability, scales with the critical switching field. However, no such correlation is expected in nanostructured synthetic ferrimagnets, where the anisotropy is poorly defined owing to the strong interlayer magnetostatic interactions between two magnetic layers. This behavior is explained by the difference in the variation of the thermal stability with the external magnetic field as a function of the thickness asymmetry between two magnetic layers. The variation is found to be smaller at a smaller thickness asymmetry, where the interlayer magnetostatic coupling is stronger. This result indicates that the correlation between the two parameters is poorest in the completely symmetric synthetic ferrimagnet, but it increases with increasing thickness asymmetry of the synthetic ferrimagnets.

Original languageEnglish
Pages (from-to)6434-6437
Number of pages4
JournalJournal of Nanoscience and Nanotechnology
Volume13
Issue number9
DOIs
Publication statusPublished - 2013 Sep 1

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ferrimagnets
Magnets
Thermodynamic stability
thermal stability
Hot Temperature
Magnetostatics
Anisotropy
asymmetry
magnetostatics
interlayers
anisotropy
Magnetic Fields
Magnetic fields
magnetic fields
interactions

Keywords

  • Critical switching field
  • Interlayer magnetostatic coupling
  • Magnetic energy barrier
  • Nanostructured cell
  • Synthetic ferrimagnet
  • Thermal stability

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Chemistry(all)
  • Materials Science(all)
  • Bioengineering
  • Biomedical Engineering

Cite this

Thermal stability and critical switching field of nanostructured synthetic ferrimagnets. / Lee, Jong Min; Lee, Tae Young; Lim, Sang Ho.

In: Journal of Nanoscience and Nanotechnology, Vol. 13, No. 9, 01.09.2013, p. 6434-6437.

Research output: Contribution to journalArticle

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