Tailoring coercive field in rare earth giant magnetostrictive materials byα-Fe precipitation

作     者：Fang-Xian Zhang Peng-Qiang Hu Zheng-Ming Zhang Jian-Hu Gong Dun-Hui Wang Fang-Xian Zhang;Peng-Qiang Hu;Zheng-Ming Zhang;Jian-Hu Gong;Dun-Hui Wang

作者机构：Division of Microelectronic Materials and DevicesHangzhou Dianzi UniversityHangzhou310018China National Laboratory of Solid State MicrostructuresNanjing UniversityNanjing210093China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2023年第42卷第2期

页      面：606-613页

核心收录：

学科分类：08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0812[工学-计算机科学与技术（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：financially supported by the National Key R&D Program of China(No.2021YFB3501401) the National Natural Science Foundation of China(No.52001103) Zhejiang Provincial Natural Science Foundation of China(No.LQ21E010001) the Ten Thousand Talents Plan of Zhejiang Province of China(No.2019R52014) 

主　　题：Giant magnetostrictive material(GMM) Precipitation Coercivity Micromagnetic simulation 

摘      要：Rare earth giant magnetostrictive materials(GMMs)Tb_(1-x)Dy_(x)Fe_(2±δ)(Tb-Dy-Fe)have been successfully employed in many microelectromechanical devices due to their excellent magnetostrictive properties at room ***,Tb-Dy-Fe still shows a relatively large coercivity with high hysteresis,which inevitably limits its application ***,micromagnetic simulations are performed to investigate the size effect of precipitated phase(α-Fe)on coercivity in *** results demonstrate that the coercivity is reduced from 31.46 to 12.48 mT with increasing the size ofα-Fe from 4 to 50 nm in Tb-Dy-Fe since the precipitated phase ofα-Fe can act as a magnetization reversal *** decreasing trend of coercivity can be well fitted with an inverse square relationship,which agrees well with the nucleation *** study highlights that the coercivity of Tb-Dy-Fe can be tailored by tuning the size ofα-Fe precipitation.