Relative strength of the interlayer dipole fields and the interlayer exchange coupling in nanostructured cells of synthetic ferrimagnets

Seul Gee Lee, Sang Ho Lim

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Both analytical and numerical calculations are carried out to examine the relative strength of the interlayer dipole fields in comparison to that of the interlayer exchange coupling in nanostructured cells of synthetic ferrimagnets as functions of their size, shape, and thickness. The relative strength in aligning the magnetizations antiparallv e el increases with decreasing cell size and with increasing cell thickness, in agreement with the size and thickness dependence of the magnetostatic interactions. As the cell shape changes from rectangle to ellipse, the relative strength decreases, due to the decreased density of free poles with the shape change. The relative strength of the interlayer dipole field is found to be not small, being approximately 10% of the strongest interlayer exchange coupling observed for the CoFeB/Ru/CoFeB structure. In an elliptical cell with the dimensions of 160 nm (long axis) × 80 nm (short axis) × 2 nm (thickness), for example, the strength is 0.016 erg/cm 2.

Original languageEnglish
Pages (from-to)6608-6611
Number of pages4
JournalJournal of Nanoscience and Nanotechnology
Volume11
Issue number7
DOIs
Publication statusPublished - 2011 Jul 1

Fingerprint

Artificial Cells
ferrimagnets
Exchange coupling
Magnets
interlayers
dipoles
Magnetostatics
Cell Shape
cells
Cell Size
Poles
Magnetization
Cells
rectangles
ellipses
magnetostatics
poles
magnetization
interactions

Keywords

  • Interlayer Dipole Fields
  • Interlayer Exchange Coupling
  • Nanostructured Cells
  • Synthetic Ferrimagnets

ASJC Scopus subject areas

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

Cite this

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abstract = "Both analytical and numerical calculations are carried out to examine the relative strength of the interlayer dipole fields in comparison to that of the interlayer exchange coupling in nanostructured cells of synthetic ferrimagnets as functions of their size, shape, and thickness. The relative strength in aligning the magnetizations antiparallv e el increases with decreasing cell size and with increasing cell thickness, in agreement with the size and thickness dependence of the magnetostatic interactions. As the cell shape changes from rectangle to ellipse, the relative strength decreases, due to the decreased density of free poles with the shape change. The relative strength of the interlayer dipole field is found to be not small, being approximately 10{\%} of the strongest interlayer exchange coupling observed for the CoFeB/Ru/CoFeB structure. In an elliptical cell with the dimensions of 160 nm (long axis) × 80 nm (short axis) × 2 nm (thickness), for example, the strength is 0.016 erg/cm 2.",
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AU - Lim, Sang Ho

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N2 - Both analytical and numerical calculations are carried out to examine the relative strength of the interlayer dipole fields in comparison to that of the interlayer exchange coupling in nanostructured cells of synthetic ferrimagnets as functions of their size, shape, and thickness. The relative strength in aligning the magnetizations antiparallv e el increases with decreasing cell size and with increasing cell thickness, in agreement with the size and thickness dependence of the magnetostatic interactions. As the cell shape changes from rectangle to ellipse, the relative strength decreases, due to the decreased density of free poles with the shape change. The relative strength of the interlayer dipole field is found to be not small, being approximately 10% of the strongest interlayer exchange coupling observed for the CoFeB/Ru/CoFeB structure. In an elliptical cell with the dimensions of 160 nm (long axis) × 80 nm (short axis) × 2 nm (thickness), for example, the strength is 0.016 erg/cm 2.

AB - Both analytical and numerical calculations are carried out to examine the relative strength of the interlayer dipole fields in comparison to that of the interlayer exchange coupling in nanostructured cells of synthetic ferrimagnets as functions of their size, shape, and thickness. The relative strength in aligning the magnetizations antiparallv e el increases with decreasing cell size and with increasing cell thickness, in agreement with the size and thickness dependence of the magnetostatic interactions. As the cell shape changes from rectangle to ellipse, the relative strength decreases, due to the decreased density of free poles with the shape change. The relative strength of the interlayer dipole field is found to be not small, being approximately 10% of the strongest interlayer exchange coupling observed for the CoFeB/Ru/CoFeB structure. In an elliptical cell with the dimensions of 160 nm (long axis) × 80 nm (short axis) × 2 nm (thickness), for example, the strength is 0.016 erg/cm 2.

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