The Fe_83.2-xCo_xP₁₀C₆Cu_0.8 amorphous alloys were synthesized by utilizing longitudinal magnetic field annealing (MF) with the aim of simultaneously improving the amorphous forming ability and soft magnetic properties. It is found that the amorphous forming ability and thermal stability of Fe_83.2-xCo_xP₁₀C₆Cu_0.8 alloys are enhanced by Co addition while both MF and Co element doping effectively suppress the crystallization behavior during the annealing process. Meanwhile, the MF eliminates the pinning defects of the internal stress, adjusts the magnetic domain structure and local magnetic inhomogeneity, thereby significantly improving soft magnetic properties. The Fe_73.2Co₁₀P₁₀C₆Cu_0.8 amorphous alloy under MF condition exhibits a high saturation magnetic flux density of 1.69 T, low coercivity of 2.9 A/m, and high relative permeability of 47,800. By magnetic domain structure observation, the soft magnetic mechanism of Fe_83.2-xCo_xP₁₀C₆Cu_0.8 amorphous alloys under MF condition is clarified, which reveals that the effective permeability is dominated by the magneto-crystalline anisotropy whereas the coercivity and relative permeability mainly depend on the field-induced anisotropy. The results provide guide for developing amorphous alloys with high B_s and regulated soft magnetic properties.

中文翻译：

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纵向磁场退火下高 Bs Fe83.2-xCoxP10C6Cu0.8 非晶合金的软磁性能及机理

利用纵向磁场退火 （MF） 合成了 Fe_83.2-xCo_xP₁₀C₆Cu_0.8 非晶合金，旨在同时提高非晶形成能力和软磁性能。研究发现，Fe_83.2-xCo_xP₁₀C₆Cu_0.8 合金的无定形形成能力和热稳定性通过 Co 添加而增强，而 MF 和 Co 元素掺杂都有效地抑制了退火过程中的结晶行为。同时，MF 消除了内应力的钉扎缺陷，调整了磁畴结构和局部磁不均匀性，从而显着改善了软磁性能。Fe_73.2Co₁₀P₁₀C₆Cu_0.8 非晶合金在 MF 条件下表现出 1.69 T 的高饱和磁通密度、2.9 A/m 的低矫顽力和 47,800 的高相对磁导率。通过磁畴结构观察，阐明了 MF 条件下 Fe_83.2-xCo_xP₁₀C₆Cu_0.8 非晶合金的软磁机理，揭示了有效磁导率以磁晶各向异性为主，而矫顽力和相对磁导率主要取决于场感应各向异性。研究结果为开发具有高 B_s 和调节软磁性能的非晶合金提供了指导。