Bulk Permanent Magnet with Enhanced Anisotropy Fabricated by Magnetic Annealing from Fe-B-Nd-Nb Bulk Metallic Glass Precursor

Abstract:

Fe_68.16B_20.16Nd_7.68Nb₄ bulk metallic glass was annealed at 973 K for 15 min with or without external magnetic fields. The maximum energy product (BH)_max measured along the axial direction of a rod sample after annealed with a magnetic field parallel to the axis is 10.9 % higher than that annealed with a perpendicular field. The intrinsic coercivity _iH_c of the sample annealed with the parallel magnetic field reached 1014 kA/m. The induced magnetic anisotropy is attributed to the formation of preferred crystallographic orientation of ferromagnetic phases under the external magnetic field.

• Periodical: Advanced Materials Research (Volume 853)
• Pages: 182-186
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.853.182
• Online since: December 2013
• Authors: Yang Cao, Guang Chen*
• Keywords: Bulk Metallic Glass (BMG), Magnetic Anisotropy, Magnetic Annealing, Permanent Magnet

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