Ultra-stable Co-based metallic glassy microwires for highly sensitive giant-magnetoimpedance sensors  

作　　者：Yuyang Qian Chaoqun Pei Haibo Ke Xintao Wei Dengke Wang Yandong Jia Baoan Sun Gang Wang Weihua Wang 

机构地区：[1]Institute of Materials,School of Materials Science and Engineering,Shanghai University,Shanghai,200444,China [2]Songshan Lake Materials Laboratory,Dongguan,523808,China [3]Institute of Physics,Chinese Academy of Sciences,Beijing,100190,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2025年第4期152-160,共9页中国科学:物理学、力学、天文学(英文版)

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.52192602,62488201,52071222,51925103,52271149;52201183);the Guangdong Major Project of Basic and Applied Basic Research,China(Grant No.2019B030302010);the Guangdong Basic and Applied Basic Research Foundation(Grant No.2023A1515110145);the National Key Research and Development Program of China(Grant No.2021YFA0716302);the Innovation Program of Shanghai Municipal Education Commission(Grant No.2021-01-07-00-09-E00114);the Innovation Program of Shanghai Science and Technology(Grant No.23520760700);the Aviation Foundation(Grant No.2023Z0530S6004);the financial support from Program 173(Grant No.2020-JCIQ-ZD-186-01);the Space Utilization System of China Manned Space Engineering(Grant No.KJZ-YY-NCL08)。

摘　　要：The development and deployment of giant magnetoimpedance(GMI)sensors have been significantly hampered by their limited sensitivity to weak magnetic fields and pronounced thermal drift phenomena,both of which are intricately linked to the microstructural properties of the sensor core material,typically composed of metallic glass microwires(MGMWs).Herein,we successfully fabricated an ultra-stable Co-based MGMW with a high GMI effect through a novel multi-step stress-Joule coupled annealing(MS-JCA)technique.The Co-based MGMW showcases a significantly improved GMI effect with an unprecedented impedance change rate of 939%,coupled with an enhanced magnetic field sensitivity of 734%/Oe.In addition,the MS-JCA process ensures the GMI sensor retains exceptional stability during thermal drift measurements over a span of20 h,characterized by a minimal signal fluctuation ratio of merely 0.59%.Notably,the ultra-stability of the GMI sensor arises from the ultra-stable energy state of the MGMWs following MS-JCA.Our findings offer a compelling strategy for significantly enhancing both the performance and stability of GMI sensors,thereby establishing a solid technical foundation for their broader application in weak magnetic detection.

关 键 词：amorphous alloy ultra-stable soft magnetic GMI effect 

分 类 号：TG139.8[一般工业技术—材料科学与工程] TP212[金属学及工艺—合金]