Evolution of coercivity during the early stages of Fe80B20 crystallization
Evolution of coercivity during the early stages of Fe80B20 crystallization
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Fe80B20 结晶早期矫顽力的演变
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
E. Puppin
中科院分区：
文献类型：
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作者：
P. Vavassori;F. Ronconi;E. Puppin
我们报告了一项关于部分结晶 Fe80B20 样品中矫顽力 (Hc) 演化的研究，其中通过受控方式获得越来越多的微晶进入铁磁非晶基体。这些样品可以测试畴壁与缺陷相互作用的现有模型，因为可以仅改变微晶的数密度而不改变其尺寸。我们观察到Hc的演化主要与晶粒的成核频率有关，而与其内部结构完全无关。观察到的 Hc 行为可以通过考虑矫顽力对钉扎位点数量密度的依赖性并假设磁畴壁在运动过程中发生二维弯曲来解释。此外，我们的结果表明，退火过程中晶间相发生的变化不会明显影响部分结晶样品的矫顽力。
We report a study of the evolution of coercivity (Hc) in partially crystallized Fe80B20 samples with an increasing number of crystallites obtained in a controlled way into ferromagnetic amorphous matrix. These samples allow to test existing models for interaction of domain walls with defects since it is possible to change only the number density of crystallites without modifying their dimensions. We observe that the evolution of Hc is mainly related to the nucleation frequency of grains and quite independent from their internal structure. The observed behavior of Hc can be accounted for by considering the dependence of coercivity on the number density of pinning sites and by assuming a two‐dimensional bending of the domain walls during their motion. Moreover our results indicate that the changes occurring to the intergranular phase during annealing do not appreciably affect coercivity in the partially crystallized samples.