Optimization of the giant magneto-impedance effect in Fe 20 Ni 80 /Cu composite wires by Joule heating annealing
Year: 2025
Type: article
Abstract: Giant magnetoimpedance (GMI) sensors are increasingly employed in modern magnetic sensing technologies. However, improving the GMI performance of magnetic cores remains challenging due to intrinsic limitations in material properties and structural stability. In this work, we explore the use of Joule heating to enhance the GMI response of Fe 20 Ni 80 /Cu composite wires. By applying a current of 1.8 A for 10 min, notable improvements in magnetic domain uniformity and a reduction in domain spacing are observed. Under these conditions, GMI ratios reach 1870% in the non-diagonal mode and 1147% in the diagonal mode, respectively, highlighting their potential for applications in high-precision weak magnetic field sensing.
Source: Chinese Physics B
Authors: Xiaofeng 晓凤 Pu 濮, Chaobo 超波 Liu 刘, Zhoulu 周路 Yu 俞, Guozhi 国志 Chai 柴, Junchen 骏琛 Gao 高, Linchuan 琳川 Wang 王, Yonggang 永刚 Liu 刘, Daqiang 大强 Gao 高
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $2,500
OpenAlex ID: W4413533956