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首页> 外文期刊>IEEE Transactions on Magnetics >Influence of Magnetic Field Annealing on Soft Magnetic Properties for Nanocrystalline Fe_(39.4-x)Co_(40)Nb_(2.6)Si_9B_9Cu_x Alloys
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Influence of Magnetic Field Annealing on Soft Magnetic Properties for Nanocrystalline Fe_(39.4-x)Co_(40)Nb_(2.6)Si_9B_9Cu_x Alloys

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摘要

The influence of magnetic field annealing and Cu content on saturation magnetostriction λ_s, effective magnetic anisotropy , and temperature dependence of initial permeability (μ_i-T curves) for nanocrystalline Fe_(39.4-x) Co_(40)Nb_(2.6)Si_9B_9Cu_x (x = 0.5, 1, 1.5) alloys was investigated. The λ_s and of the alloys were both decreased with Cu content increasing. Magnetic field annealing can obviously reduce λ_s, which is due to the rearrangement of random oriented magnetic domain along applied field direction. The increase of is due to the presence of a coherent induced magnetic anisotropy K_u under magnetic field annealing, which can be explained in terms of the directional atomic pair ordering theory. In addition, the inverse dependence between μ_i and could be changed in the case of magnetic field annealing. In contrast to nonmagnetic field annealing, magnetic field annealing can enhance the room- and high-temperature initial permeability of nanocrystalline Fe_(39.4-x)Co_(40)Nb_(2.6)Si_9 B_9Cu_x (x = 0.5, 1, 1.5) alloys; the reason of which was also analyzed.

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