Simulation of alnico coercivity [electronic resource].
- Washington, D.C. : United States. Dept. of Energy, 2017. and Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
- Physical Description:
- Article numbers 022,403 : digital, PDF file
- Additional Creators:
- Ames Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
- Restrictions on Access:
- Free-to-read Unrestricted online access
- Micromagnetic simulations of alnico show substantial deviations from Stoner-Wohlfarth behavior due to the unique size and spatial distribution of the rod-like Fe-Co phase formed during spinodal decomposition in an external magnetic field. Furthemore, the maximum coercivity is limited by single-rod effects, especially deviations from ellipsoidal shape, and by interactions between the rods. In both the exchange interaction between connected rods and magnetostatic we consider the interaction between rods, and the results of our calculations show good agreement with recent experiments. Unlike systems dominated by magnetocrystalline anisotropy, coercivity in alnico is highly dependent on size, shape, and geometric distribution of the Fe-Co phase, all factors that can be tuned with appropriate chemistry and thermal-magnetic annealing.
- Published through SciTech Connect., 07/10/2017., "is-j--9371", Applied Physics Letters 111 2 ISSN 0003-6951 AM, and Liqin Ke; Ralph Skomski; Todd D. Hoffmann; Lin Zhou; Wei Tang; Duane D. Johnson; Matthew J. Kramer; Iver E. Anderson; C. -Z. Wang.
- Funding Information:
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