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Shape Dependent Coercivity Simulation of a Spherical Barium Ferrite (S-BaFe) Particle with Uniaxial Anisotropy
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  • Journal title : Journal of Magnetics
  • Volume 17, Issue 1,  2012, pp.1-5
  • Publisher : The Korean Magnetics Society
  • DOI : 10.4283/JMAG.2012.17.1.001
 Title & Authors
Shape Dependent Coercivity Simulation of a Spherical Barium Ferrite (S-BaFe) Particle with Uniaxial Anisotropy
Abo, Gavin S.; Hong, Yang-Ki; Jalli, Jeevan; Lee, Jae-Jin; Park, Ji-Hoon; Bae, Seok; Kim, Seong-Gon; Choi, Byoung-Chul; Tanaka, Terumitsu;
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The coercivity of a single 27 nm-spherical barium ferrite (S-BaFe) particle was simulated using three models: 1) Gibbs free energy (GFE), 2) Landau-Lifshitz-Gilbert (LLG), and 3) Stoner-Wohlfarth (S-W). Spherically and hexagonally shaped particles were used in the GFE and LLG simulations to investigate coercivity with the different shape anisotropies. The effect of shape was not included in the S-W model. It was found that the models using a spherical shape resulted in a coercivity higher than the models using the hexagonal shape with both shapes having the same diameter. The coercivity estimated with the S-W model was approximately the same as that for the spherical-shape models, which indicates that spherical shape has no significant effect on the particle`s coercivity at nanoscale.
spherical barium ferrite;micromagnetic simulation;shape anisotropy;
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