Revealing the Impact of Ferromagnetic Elements on Fe-Based Amorphous Alloy Properties via ab initio Molecular Dynamics Simulations and Experiments  

作　　者：Jin-Hua Xiao Da-Wei Ding Lin Li Yi-Tao Sun Mao-Zhi Li Wei-Hua Wang 肖晋桦;丁大伟;李琳;孙奕韬;李茂枝;汪卫华(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Beijing 102206,China;Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials&Micro-nano Devices,Renmin University of China,Beijing 100872,China)

机构地区：[1]State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Beijing 102206,China [2]Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China [3]Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials&Micro-nano Devices,Renmin University of China,Beijing 100872,China

出　　处：《Chinese Physics Letters》2025年第1期102-113,共12页中国物理快报(英文版)

基　　金：supported by the National Natural Science Foundation of China under Grant No.10225417;the National Basic Research Program of China under Grant No.2006CB601003。

摘　　要：A high saturation magnetic flux density(Bs)is essential for the development of Fe-based amorphous alloys for electromagnetic devices and motors.However,achieving a high Bs often compromises the glass-forming ability(GFA)of Fe-based amorphous alloys.This study investigates the effects of ferromagnetic elements(Fe,Co,and Ni)on the microstructure and magnetic properties of Fe86B7C7 amorphous alloys through experiments and ab initio molecular dynamics simulations.By analyzing both the experimental and simulation results,the relationship between the atomic structures,GFA,and magnetic properties of these amorphous alloys was determined.The results indicate that the GFA of the alloys is correlated with the proportion of icosahedral and body-centered cubic clusters.The addition of Co and Ni not only improved the GFA of the alloys but also effectively increased the overall magnetic moment with an appropriate amount of Co and a small amount of Ni.This increase in the magnetic moment primarily arises from the enhancement of the magnetic moment of Fe atoms,resulting from the redistribution between the spin-up and spin-down electrons of Fe-3d orbits,as well as the strong exchange interactions between Fe and Co and Fe–Ni pairs.The results obtained offer valuable insights into the correlation between the atomic structure and magnetic properties of these amorphous alloys and suggest potential directions for the optimization of Fe-based amorphous alloys.

关 键 词：ALLOYS microstructure magnetic 

分 类 号：TG1[金属学及工艺—金属学]