Controlled synthesis and excellent magnetism of ferrimagnetic NiFe_(2)Se_4 nanostructures  

作　　者：Juanjuan Wang Fang Wang Bin Qin Yue Wu Huan Yang Xiaolong Li Lanfang Wang Xiufang Qin Xiaohong Xu 

机构地区：[1]Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education&School of Chemistry and Materials Science of Shanxi Normal University,Taiyuan 030032,China [2]Department of Chemistry&Chemical Engineering,Lyuliang University,Lishi 033001,China [3]Collaborative Innovation Center for Advanced Permanent Magnetic Materials and Technology of Ministry of Education&Research Institute of Materials Science of Shanxi Normal University,Taiyuan 030032,China

出　　处：《Chinese Chemical Letters》2024年第11期554-558,共5页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.51971122,52371191,52301244);the National Key R&D Program of China(No.2022YFB3505301)。

摘　　要：3d transition metal chalcogenides have attracted much attention due to their unique magnetic properties.Although various Cr,V,and Fe-based chalcogenides have been fabricated recently,the limited Curie temperature(T_C)still hinders their practical application.Based on the structural and magnetic advantages of MFe_(2)O_(4)and Fe_(3)Se_(4),we developed a one-pot solution synthesis method for the fabrication of NiFe_(2)Se_(4)nanostructures with structural continuity,to facilitate the investigation of their magnetic properties.Notably,the morphology of Ni Fe_(2)Se_(4)can be controlled from nano-rods to nano-platelets by controlling the growth direction.The coercivity(H_(C))of NiFe_(2)Se_(4)with nano-cactus structure exhibits a maximum of 12.77kOe at 5 K.The coercivity of ferrimagnetic NiFe_(2)Se_(4)nano-platelets can be further adjusted to 1.52 kOe at room temperature.These results show that the magnetic properties of NiFe_(2)Se_(4)can be significantly modified by controlling their morphologies.We also extend the method to the synthesis of Co Fe_(2)Se_(4)nano-cactus with an ultrahigh coercivity of 17.85 k Oe at 5 K.Obviously,the synthesis strategy and their excellent magnetic properties of MFe_(2)Se_(4)have sparked interest in ternary transition metal selenides as potential hard magnetic materials.

关 键 词：Transition metal selenides Hard magnetic materials NiFe_(2)Se_(4) FERRIMAGNETIC Solution-process 

分 类 号：TB383.1[一般工业技术—材料科学与工程]