Influence of Aspect Ratio on Giant Magnetoimpedance Effect for Fe_(67)Co_(18)Si_(11)B_4 Amorphous Ribbons  

作　　者：Yan-Hong Ding Ke Xue Wei-Yan Wang Xu Ma 

机构地区：[1]School of Electrical and Electronic Engineering, Tianjin Key Laboratory of Film Electronic and Communication Devices, Tianjin University of Technology, Tianjin 300384, China [2]School of Material Science and Engineering, Tianjin University of Technology, Tianjin 300384, China [3]Tianjin Engineering Center of Near-Net-Shape Forming Technology for Metallic Materials, Tianjin 300402, China

出　　处：《Acta Metallurgica Sinica(English Letters)》2017年第12期1236-1242,共7页金属学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No.51101113);the Tianjin Natural Science Foundation (Nos.14JCYBJC16200 and 15JCZDJC38700)

摘　　要：The effect of sample geometry aspect ratio （l/w） on the giant magnetoimpedance （GMI） in Fe67Co18Si11B4 amorphous ribbons was investigated systematically. The GMI profiles were measured as a function of the external magnetic field at different frequencies up to 110 MHz. The results show that there exists a critical aspect ratio （（l/w）0 = 5.4） below which the maximum GMI effect and sensitivity η decrease with decreasing l/w and above which the maximum GMI effect keeps almost constant and η decreases with increasing l/w. The observed dependence on aspect ratio as （l/w） 〈 （l/w）0 is correlated with the magnetization process： Complex domain structures emerged near the ribbon ends to decrease the magnetostatic energy, modify the transverse permeability and consequently GMI response. Contributions from transverse permeability and resistance may dominantly determine the change of GMI effect as （l/w） 〉 （l/w）0.The effect of sample geometry aspect ratio （l/w） on the giant magnetoimpedance （GMI） in Fe67Co18Si11B4 amorphous ribbons was investigated systematically. The GMI profiles were measured as a function of the external magnetic field at different frequencies up to 110 MHz. The results show that there exists a critical aspect ratio （（l/w）0 = 5.4） below which the maximum GMI effect and sensitivity η decrease with decreasing l/w and above which the maximum GMI effect keeps almost constant and η decreases with increasing l/w. The observed dependence on aspect ratio as （l/w） 〈 （l/w）0 is correlated with the magnetization process： Complex domain structures emerged near the ribbon ends to decrease the magnetostatic energy, modify the transverse permeability and consequently GMI response. Contributions from transverse permeability and resistance may dominantly determine the change of GMI effect as （l/w） 〉 （l/w）0.

关 键 词：AMORPHOUS Magnetic property MAGNETOIMPEDANCE 

分 类 号：TB303[一般工业技术—材料科学与工程]