丝带
材料科学
无定形固体
分布(数学)
复合材料
结晶学
化学
数学
数学分析
作者
Katariina Pussi,B. Barbiellini,Koji Ohara,Hiroki Yamada,Jagrati Dwivedi,Arun Bansil,Ajay Gupta,Saeed Kamali
标识
DOI:10.1088/1361-648x/ac1238
摘要
We discuss the atomic structure of amorphous ferromagnetic FeCoB alloys, which are used widely in spintronics applications.Specifically, we obtain the pair-distribution functions for various atomic pairs based on high-energy x-ray diffraction data taken from an amorphous Co 20 Fe 61 B 19 specimen.We start our reverse Monte Carlo cycles to determine the disordered structure with a two-phase model in which a small amount of cobalt is mixed with Fe 23 B 6 as a second phase.The structure of the alloy is found to be heterogeneous, where the boron atoms drive disorder through the random occupation of the atomic network.Our analysis also indicates the presence of small cobalt clusters that are embedded in the iron matrix and percolating the latter throughout the structure.This morphology can explain the enhanced spin polarization observed in amorphous magnetic materials.
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