First-principles study of ferromagnetic metal Fe5GeTe2

作     者：Minwoong Joe Unchun Yang Changgu Lee Minwoong Joe;Unchun Yang;Changgu Lee

作者机构：School of Mechanical EngineeringSungkyunkwan University2066Seobu-roJangan-guSuwonGyeonggi16419South Korea School of SoftwareChung-Ang University84Heukseok-roDongjak-guSeoul06974South Korea 

出 版 物：《Nano Materials Science》 (纳米材料科学（英文版）)

年 卷 期：2019年第1卷第4期

页      面：299-303页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 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）] 0702[理学-物理学] 

基　　金：supported by the Institute for Information & Communications Technology Promotion (IITP) grant (B0117-16-1003) the National Research Foundation of Korea (NRF) grant funded by the Ministry of Education (2016R1A6A3A11934734, 2019R1I1A1A01061466) the KISTI grant (KSC-2016-C1-0017) 

主　　题：properties. ferromagnetic magnetic 

摘      要：For next-generation flexible spin devices,it is crucial to discover and study novel high Tc two-dimensional(2D)magnetic materials considering their atomic-level thickness and flexural mechanical ***,we investigated physical properties of a recently rediscovered ferromagnetic 2D material,Fe5GeTe2,which has near-room temperature Tc,such as stability of monolayer,and electronic and magnetic properties as well as their changes under strain using DFT *** found that monolayer formation energy of Fe5GeTe2 lies inside the energy range of other 2D materials,and thus successful synthesis of the monolayer is *** structures and density of states(DOS)calculations reveal that monolayer Fe5GeTe2 is metallic and of Stoner-type ***,we checked the strain effect on its magnetic *** ferromagnetic(FM)coupling is quite robust under biaxial strain and enhanced significantly with the increase of Fe magnetic moment from 1.65μBto 2.66μBwhile the strain increases from zero to+15%.Such a tunable magnetism of Fe5GeTe2 could provide an extra advantage for flexible magnetic device applications.