Magnetic emission intensity enhancement for amorphous alloys by constructing a multi-phase structure withα-Fe nanocrystals  

作　　者：Ke Liu Zhi Qin Jie Shen Zhi Cheng Shiyue You Liang Ma Jing Zhou Wen Chen 

机构地区：[1]State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China [2]Sanya Science and Education Innovation Park,Wuhan University of Technology,Sanya 572024,China [3]Hubei Longzhong Laboratory,Wuhan University of Technology Xiangyang Demonstration Zone,Xiangyang 441000,China

出　　处：《Nano Research》2024年第7期6630-6637,共8页纳米研究（英文版）

基　　金：supported by the Key Research and Development Program of Hubei Province(No.2021BAA214);the Open Fund of Sanya Science and Education Innovation Park of Wuhan University of Technology(Nos.2021KF0022,2021KF0013,and 2020KF0026);Independent Innovation Projects of the Hubei Longzhong Laboratory(Nos.2022ZZ-34 and 2022ZZ-35);the National Science Fund for Distinguished Young Scholars of Hubei Province(No.201CFA067);the National innovation and entrepreneurship training program for college students(Nos.202310497010 and S202310497026).

摘　　要：The perturbation in the magnetic field generated by the rotation or oscillation of magnetic domains in magnetic materials can emit low-frequency electromagnetic waves,which are expected to be used in low-frequency communications.However,the magnetic emission intensity,defined by the perturbation ability,of current commercially applied amorphous alloys,such as Metglas,cannot meet the application requirements for low-frequency antennas due to the domain motion energy loss.Herein,a multi-phase Metglas amorphous alloy was constructed by incorporatingα-Fe nanocrystals using rapid annealing to manipulate the domain movement.It was found that 3.89 times higher magnetic emission intensity is obtained compared to the pristine due to the synergism of the deformation and displacement mechanisms.Moreover,the low-frequency magnetic emission performance verification was carried out by preparing magnetoelectric composites as the antenna vibrator by assembling the alloy and macro piezoelectric fiber composites(MFC).Enhancements of magnetic emission intensity are found at 93.3%and 49.2%at the first and second harmonic frequencies compared with the unmodified alloy vibrator.Therefore,the approach leads to the development of high-performance communication with a novel standard for evaluation.

关 键 词：multi-phase amorphous alloys magnetic emission intensity enhancing mechanism magnetic domain pinning theory Jiles-Atherton model analysis 

分 类 号：TG14[一般工业技术—材料科学与工程]