Submonolayer Eu superstructures—A class of 2D magnets  

作　　者：Dmitry V.Averyanov Ivan S.Sokolov Alexander N.Taldenkov Oleg E.Parfenov Andrey M.Tokmachev Vyacheslav G.Storchak 

机构地区：[1]National Research Center“Kurchatov Institute”,Kurchatov Sq.1,Moscow 123182,Russia

出　　处：《Nano Research》2023年第1期1500-1506,共7页纳米研究（英文版）

基　　金：This work is supported by NRC“Kurchatov Institute”,the Ministry of Science and Higher Education of Russia(Agreement No.075-15-2021-1351);the Russian Science Foundation(grants No.22-13-00004(synthesis);20-79-10028(structural characterization);19-19-00009(studies on magnetism)).

摘　　要：Two-dimensional(2D)magnetic materials promise unconventional properties and quantum phases as well as advances in ultracompact spintronics.Miniaturization of 2D magnets often reaches a single monolayer but in general can go beyond this limit,as demonstrated by 2D magnetism of submonolayer Eu superstructures coupled with Si.The question is whether the submonolayer magnetism constitutes a general phenomenon.Herein,we demonstrate that regular Eu lattices form a class of 2D magnets displaying various structures,stoichiometries,and chemical bonding.We synthesized and studied a set of Eu superstructures on Ge(001).Their magnetic properties are consistent with the emergence of a magnetic order such as ferro-or ferrimagnetism.In particular,control over the magnetic transition temperature by weak magnetic fields indicates the 2D nature of the magnetism.Taken together,Eu/Ge and Eu/Si superstructures seed a nucleus of the research area addressing the emergence of magnetism in submonolayer chemical species.

关 键 词：two-dimensional(2D)magnetism SUBMONOLAYER SUPERSTRUCTURE surface reconstruction germanium 

分 类 号：TB34[一般工业技术—材料科学与工程]