非晶合金(Fe1-xCox)86Hf7B6Cu1 (x=0.4~0.6) 磁性的EET理论研究

Magnetism of Amorphous (Fe1-xCox)86Hf7B6Cu1 (x=0.4~0.6) Alloy by EET Theory

摘要:

采用熔体单辊急冷法制备了非晶(Fe1-xCox)86Hf7B6Cu1 (x=0.4~0.6)合金，使用穆斯堡尔谱仪、透射电镜（TEM）和振动样品磁强计(VSM)对其进行了表征，穆斯堡尔谱和TEM结果表明所制样品均为非晶态。然后借助于固体与分子经验电子理论（EET理论），计算了非晶(Fe1-xCox)86Hf7B6Cu1合金的价电子结构和磁矩，磁矩的理论计算值与实验测定值的误差小于10%，满足一级近似要求，实现了从价电子层次上计算非晶(Fe1-xCox)86Hf7B6Cu1合金的磁矩，这对于优化非晶合金(Fe1-xCox)86Hf7B6Cu1的软磁性能将具有理论指导意义。

Abstract:

Amorphous ribbons (Fe1-xCox)86Hf7B6Cu1 (x=0.4~0.6) were prepared using the single-roller melt-spinning technique. M?ssbauer Spectroscopy, transmission electron microscope (TEM) and vibrating sample magnetometer (VSM) were used to characterize microstructures and soft magnetic properties. The result confirms the fully amorphous state of the as-quenched alloy. The valence electron structures and the magnetic moment of the amorphous alloys were calculated using the method of Bond Length Difference (BLD) of the Empirical Electron Theory of solids and molecules (EET). The error of the computed value in theory and experimental value of the magnetic moment is less than 10%, which satisfies the demand of first approximation, indicating that magnetic moment calculation of amorphous alloy could be realized on the valence electron level.