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Enhanced nucleation fields due to dipolar interactions in nanocomposite magnets

  • Johann Fischbacher
  • Simon Bance
  • Lukas Exl
  • Markus Gusenbauer
  • Harald Oezelt
  • Franz Reichel
  • Thomas Schrefl
Regular Article
  • 197 Downloads
Part of the following topical collections:
  1. Topical issue: New Trends in Magnetism and Magnetic Materials

Abstract

One approach to construct powerful permanent magnets while using less rare-earth elements is to combine a hard magnetic material having a high coercive field with a soft magnetic material having a high saturation magnetization at the nanometer scale and create so-called nanocomposite magnets. If both materials are strongly coupled, exchange forces will form a stable magnet. We use finite element micromagnetics simulations to investigate the changing hysteresis properties for varying arrays of soft magnetic spherical inclusions in a hard magnetic body. We show that the anisotropy arising from dipolar interactions between soft magnetic particles in a hard magnetic matrix can enhance the nucleation field by more than 10% and strongly depends on the arrangement of the inclusions.

Keywords

Dipolar Interaction Magnetic Reversal Easy Axis Central Sphere Nanocomposite Magnet 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Johann Fischbacher
    • 1
  • Simon Bance
    • 1
  • Lukas Exl
    • 1
  • Markus Gusenbauer
    • 1
  • Harald Oezelt
    • 1
  • Franz Reichel
    • 1
  • Thomas Schrefl
    • 1
  1. 1.St. Poelten University of Applied SciencesSt. PoeltenAustria

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