Origin of low coercivity of (Fe0.75B0.15Si0.10)100-xNbx (x=1-4) glassy alloys
Origin of low coercivity of (Fe0.75B0.15Si0.10)100-xNbx (x=1-4) glassy alloys
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DOI：
10.1063/1.2158587
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发表时间：
2006-04-15
影响因子：
3.2
通讯作者：
Inoue, A
中科院分区：
文献类型：
--
作者：
Bitoh, T;Makino, A;Inoue, A
研究了熔纺(Fe0.75B0.15Si0.10)(100-x)Nb-x (x=1-4)玻态合金的密度和磁化过程，以阐明低矫顽力(H-c)的根源。 H-c 以及结晶相和玻璃相之间的密度差（对应于玻璃相的自由体积）都随着 Nb 含量的增加而减小。基于铁磁饱和趋近定律的磁化过程分析表明，准位错偶极子（QDD）型缺陷是弹性应力的主要来源。结果还表明，一种 QDD 型缺陷产生的磁畴壁钉扎力与 Nb 含量无关，但 QDD 的数密度随着 Nb 含量的增加而降低。因此，得出结论，非晶合金低H-c的根源是QDD的低数密度，这对应于磁畴壁钉扎位点的低数密度。 (C) 2006 年美国物理研究所。
The density and the magnetization process of the melt-spun (Fe0.75B0.15Si0.10)(100-x)Nb-x (x=1-4) glassy alloys have been investigated to clarify the origin of low coercivity (H-c). Both H-c and the difference of the densities between the crystalline and glassy phases, which corresponds to the free volume in the glassy phase, decrease with increasing Nb content. An analysis of the magnetization process based on the law of approach to ferromagnetic saturation reveals that quasidislocation dipole (QDD)-type defects are the main sources of elastic stress. The results also suggest that the pinning force for magnetic domain walls generated by one QDD-type defect is independent of the Nb content, but the number density of QDDs decreases with increasing the Nb content. Therefore, it concluded that the origin of low H-c of the glassy alloys is the low number density of QDDs which corresponds to the low number density of the domain-wall pinning sites. (C) 2006 American Institute of Physics.