Abstract
Herein, we have presented the giant magneto-impedance (GMI) effect, microstructure and surface domain structure of the Co-Fe-based amorphous microwires after liquid medium—anhydrous ethanol Joule annealing (AJA). The AJA technique can effectively release the radial stress and induce large a circumferential magnetic field by changing the Joule heat transfer and the circumferential domain, to further tune the GMI performance of microwire. The linear response fields (0~3.5 Oe), the high sensitivity of 124.1%/Oe and the high GMI ratio make the microwire as promising materials for the miniaturized GMI sensors. The GMI ratios of [ΔZ/Z0]max(%) and [ΔZ/Zmax]max(%) increase the near-linearly to 201.9% and 200.5%, respectively, for the 250 mA anhydrous ethanol Joule annealed wires. Moreover, a linear response to Hex (ranging from 3.5 to 25 Oe, or more) is observed, which bears the potential in fabricating bi-sensors.
Funder
National Natural Science Foundation of China
Inner Mongolia Natural Science Cultivating Fund for Distinguished Young Scholars
Program for Innovative Research Team in Universities of Inner Mongolia Autonomous Region
Inner Mongolia University of Technology Key Discipline Team Project of Materials Science
Ministry of Education Industry University Research Project
Subject
General Materials Science,Metals and Alloys
Cited by
4 articles.
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