Effect of Si on the field-induced anisotropy in Fe-rich nanocrystalline soft magnetic alloys
Effect of Si on the field-induced anisotropy in Fe-rich nanocrystalline soft magnetic alloys
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DOI：
10.1016/j.jallcom.2016.11.330
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发表时间：
2017-02
影响因子：
6.2
通讯作者：
R. Parsons;J. Garitaonandia;T. Yanai;K. Onodera;H. Kishimoto;A. Kato;Kiyonori Suzuki
中科院分区：
文献类型：
--
作者：
R. Parsons;J. Garitaonandia;T. Yanai;K. Onodera;H. Kishimoto;A. Kato;Kiyonori Suzuki
场致磁各向异性（Ku）和超精细相互作用的纳米晶Febal. B14 <$14. 8 SixCu 1. 5（x = 0，1，2和4）合金进行了研究。57 Fe穆斯堡尔谱被用来量化的Si含量和体积分数的非晶和bcc-Fe（Si）相纳米烧结后。然后使用该信息来估计bcc-Fe（Si）相的localKu贡献。随着Si含量从0增加到4at%，这些纳米晶合金的体Ku值从40 ± 5 J/m3增加到69 ± 5 J/m3。发现bcc-Fe（Si）相的局域Ku随着Si含量的增加而增加，正如众所周知的方向对有序模型所预测的那样，并且当局部Si含量约为6at%时，局域Ku显示出172 ± 14 J/m3的大值。向富铁纳米晶合金中添加Si被广泛认为是改善磁性软度的有效手段。然而，这项研究的结果意味着，少量的Si添加到富Fe纳米晶合金可能会导致不良的影响，如果结晶体积分数特别大。
The field-induced magnetic anisotropy (Ku) and hyperfine interactions have been investigated for nanocrystalline Febal.B14∼14.8SixCu1.5(x = 0, 1, 2 and 4) alloys.57Fe Mössbauer spectroscopy was used to quantify the Si contents and volume fractions of the amorphous and bcc-Fe(Si) phases after nanocrystallisation. This information was then used to estimate the localKucontribution from the bcc-Fe(Si) phase. The bulkKuvalue of these nanocrystalline alloys showed an increase from 40 ± 5 J/m3to 69 ± 5 J/m3with increasing Si content from 0 to 4 at%. The localKuof the bcc-Fe(Si) phase was found to increase in line with Si content, as predicted by the well-known directional pair ordering model and showed a large value of 172 ± 14 J/m3for a local Si content of around 6 at%. The addition of Si to Fe-rich nanocrystalline alloys is widely perceived as an effective means for improving magnetic softness. However, the findings of this study imply that small additions of Si to Fe-rich nanocrystalline alloys may result in undesirable effects if the crystalline volume fraction is especially large.