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| Shape Dependent Coercivity Simulation of a Spherical Barium Ferrite (S-BaFe) Particle with Uniaxial Anisotropy |
| Journal of Magnetics, Volume 17, Number 1, 31 Mar 2012, Pages 1-5 |
Gavin S. Abo (Department of Electrical and Computer Engineering and MINT Center, The University of Alabama), Yang-Ki Hong *  (Department of Electrical and Computer Engineering and MINT Center, The University of Alabama), Jeevan Jalli (Department of Electrical and Computer Engineering and MINT Center, The University of Alabama), Jaejin Lee , Jihoon Park (Department of Electrical and Computer Engineering and MINT Center, The University of Alabama), Seok Bae (Department of Electrical and Computer Engineering and MINT Center, The University of Alabama), Seong-Gon Kim (Department of Physics and Astronomy, Mississippi State University), Byoung-Chul Choi (Department of Physics and Astronomy, University of Victoria), Terumitsu Tanaka (Department of Information Science and Electrical Engineering, Kyushu University) |
| Abstract |
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.
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| Keywords: spherical barium ferrite; micromagnetic simulation; shape anisotropy |
| DOI: http://dx.doi.org/10.4283/JMAG.2012.17.1.001 |
| Full Text: PDF |
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