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Abstract
High saturation magnetization and magnetic anisotropy are helpful for getting a high frequency electromagnetic microwave absorption performance. The α- Fe possesses a high saturation magnetization. Fe - B phases exhibit a relatively higher magnetic anisotropy and higher resistivity than α- Fe simultaneously. In this work, we made nanocrystalline powders of Fe 82 B 17 Cu 1, mainly consisting of α- Fe and Fe 2 B phases, by ball milling and post-annealing. Electromagnetic microwave characterization shows that Fe 82 B 17 Cu 1 powders possess a relative high permeability and considerable permittivity. Due to a good electromagnetic impedance matching, a good electromagnetic microwave absorption property (RL < -35 dB) has been achieved at 3.6 GHz. The experimental frequency and the matching thickness are coincident with the quarter wavelength matching condition.
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