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Effect of germanium on the microstructure and the magnetic properties of Fe-B-Si amorphous alloys

机译:锗对Fe-B-Si非晶合金的组织和磁性能的影响

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摘要

In this work, we present a systematic study on the crystallization kinetics and the magnetic properties of melt-spun Fe _(80)B 10Si _(10 - x)Ge _x (x = 0.0 - 10.0) amorphous alloys. The activation energy for crystallization, determined by differential scanning calorimetry, displayed a strong dependence on the Ge content, reflecting a deleterious effect on the alloys' thermal stability and their glass forming ability with increasing Ge concentration. On the other hand, the alloys exhibited excellent soft magnetic properties, i.e., high saturation magnetization values (around 1.60 T), alongside Curie temperatures of up to 600 K. Complementary, for increasing Ge substitution, the ferromagnetic resonance spectra showed a microstructural evolution comprising at least two different magnetic phases corresponding to a majority amorphous matrix and to Fe(Si, Ge) nanocrystallites for x ≥ 7.5.
机译:在这项工作中,我们对熔纺Fe _(80)B 10Si _(10-x)Ge _x(x = 0.0-10.0)非晶态合金的结晶动力学和磁性能进行了系统的研究。通过差示扫描量热法测定的结晶活化能显示出对Ge含量的强烈依赖性,反映出随着Ge浓度的增加,合金的热稳定性及其玻璃形成能力受到有害影响。另一方面,合金表现出优异的软磁性能,即高饱和磁化强度值(约1.60 T),居里温度高达600K。作为补充,对于增加的Ge取代,铁磁共振谱显示出微观结构演变,包括至少两个不同的磁相对应于x≥7.5的多数非晶质基质和Fe(Si,Ge)纳米微晶。

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