Novel CoFeAlMn high-entropy alloys with excellentsoft magnetic properties and high thermal stability

作     者：Wei Gao Yaqiang Dong Xingjie Jia Liping Yang Xubin Li Shouding Wu Ronglin Zhao Hang Wu Qiang Li Aina He Jiawei Li Wei Gao;Yaqiang Dong;Xingjie Jia;Liping Yang;Xubin Li;Shouding Wu;Ronglin Zhao;Hang Wu;Qiang Li;Aina He;Jiawei Li

作者机构：Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology CAS Key Laboratory of Magnetic Materials and DevicesNingbo Institute of Materials Technology&EngineeringChinese Academy of SciencesNingbo 315201China School of Physical and TechnologyXinjiang UniversityUrumqiXinjiang 830000China University of Chinese Academy of SciencesBeijing 100049China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2023年第153卷第22期

页      面：22-31页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by Youth Innovation Promotion Association CAS (Grant No.2021294) the S&T Innovation 2025 Major Special Program (Grant No.2021Z038) the 2022 Xinjiang Uygur Autonomous Region Postgraduate Innovation Research Program (Grand No.XJ2022G070) the Tianshan Innovation Team Program of Xinjiang Uygur Autonomous Region (Grand No.2020D14038) 

主　　题：High-entropy alloys Soft magnetic powder cores Magnetic properties High saturation magnetization Magnetic domain 

摘      要：High-entropy alloys(HEAs),which are composed of 3d transition metals such as Fe,Co,and Ni,exhibit an exceptional combination of magnetic and other properties;however,the addition of non-ferromagnetic elements always negatively affects the saturation magnetization strength(M s).Co_(4)Fe_(2)Al_(x)Mn_(y) alloys were designed and investigated in this study to develop a novel HEA with excellent soft magnetic *** Co_(4)Fe_(2)Al_(1.5)Mn_(1.5) HEA possesses the highest M s of 161.3 emu g^(-1) thus far reported for magnetic HEAs,a low coercivity of 1.9 Oe,a high electrical resistivity of 173μΩ cm,a superior thermal stability up to 600℃,which originates from the novel microstructure of B2 nanoparticles distributed in a DO_(3) matrix phase,and the crucial transition of Mn from antiferromagnetism to ferromagnetism with the assistance of *** Co_(4)Fe_(2_)Al_(1.5)Mn_(1.5) HEA was selected to produce micron-sized powder and soft magnetic powder cores(SMPCs)for application in the exploration *** SMPCs exhibit a high stable effective perme-ability of 35.9 up to 1 MHz,low core loss of 38.1 mW cm^(-3)(@100 kHz,20 mT),and an excellent direct current(DC)bias performance of 87.7%at 100 *** study paves the way for the development of soft magnetic HEAs with promising applications as magnetic functional materials.