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首页> 外文期刊>Physica status solidi, B. Basic research >Hyperfine magnetic field distributions of Fe0.8-qMnqAl0.2 disordered alloys: Interpretation in a local model
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Hyperfine magnetic field distributions of Fe0.8-qMnqAl0.2 disordered alloys: Interpretation in a local model

机译：Fe0.8-qMnqAl0.2无序合金的超细磁场分布：局部模型的解释

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摘要

In order to give an interpretation of the room temperature hyperfine magnetic field distributions of Fe0.8-qMnqAl0.2 (0 less than or equal to q less than or equal to 0.25) disordered alloys, we employ a local model based on a binomial distribution method. In the model, the constituent atoms are assumed to be randomly distributed in a b.c.c. lattice accordingly with the disordered character of the system and its crystalline structure. Results show that the substitution of an iron atom by an aluminum atom, in the first Fe coordination shell, produces a reduction in the hyperfine field of 20.8 kOe. Analogously, the substitution Fe by Mn originates a reduction of 24.1 kOe. Differently from this, substitutions in the second coordination shell produce reductions of 6.6 kOe and 3.3 kOe for Al and Mn, respectively. The model allows also obtaining the average hyperfine field as well as to determine the most probable configurations (sites) of the system, involving nearest and next nearest neighbors. Finally, results are compared with experimental results obtained by Mossbauer spectroscopy. [References: 10]
机译：为了解释无序合金Fe0.8-qMnqAl0.2（0小于或等于q小于或等于0.25）的室温超细磁场分布，我们采用基于二项分布的局部模型方法。在模型中，假定组成原子随机地分布在不列颠哥伦比亚省。因此，晶格具有系统的无序特征及其晶体结构。结果表明，在第一个Fe配位壳中，铁原子被铝原子取代，使超精细场降低了20.8 kOe。类似地，Mn取代Fe引起24.1 kOe的减少。与此不同的是，第二配位壳中的取代分别使Al和Mn降低6.6 kOe和3.3 kOe。该模型还可以获取平均超精细场以及确定系统的最可能配置（站点），包括最近邻居和下一个最近邻居。最后，将结果与通过莫斯鲍尔光谱法获得的实验结果进行比较。 [参考：10]

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