摘要
Two-dimensional(2D)magnetic crystals with intrinsic ferromagnetism are highly desirable for novel spin-electronic devices.However,the controllable synthesis of 2D magnets,especially the direct growth of 2D magnets on substrate surfaces,is still a challenge.Here,we demonstrate the synthesis of ultrathin zinc-blende phase manganese selenide(β-MnSe)nanosheets using the chemical vapor deposition(CVD)technique.The 2Dβ-MnSe crystals exhibit distinct ferromagnetic properties with a Curie temperature of 42.3 K.Density functional theory(DFT)calculations suggest that the ferromagnetic order inβ-MnSe originates from the exchange coupling between the unsaturated Se and Mn atoms.This study presents significant progress in the CVD growth of ultrathin 2D magnetic materials by thinning bulk magnets,and it will pave the way for the building of energy-efficient spintronic devices in the future.
基金
National Natural Science Foundation of China,Grant/Award Numbers:11828401,11964024,21971113
Startup Project of Inner Mongolia University,Grant/Award Number:21200‐5175101
National Research Foundation–Competitive Research Program of Singapore,Grant/Award Numbers:CRP22‐2019‐0060,NRF‐CRP21‐2018‐0007,NRF2017‐ANR0022DPS
fund of University of Macao,Grant/Award Numbers:MYRG2018‐00079‐IAPME,MYRG2019‐00115‐IAPME
MOE Tier 2,Grant/Award Number:MOE2017‐T2‐2‐136
Tier 3,Grant/Award Number:MOE2018‐T3‐1‐002
Science and Technology Development Fund of Macao SAR,Grant/Award Numbers:FDCT0059/2018/A2,FDCT009/2017/AMJ
Fund of Shenzhen Science and Technology Innovation Committee,Grant/Award Number:SGDX20201103093600003
Shanghai Pujiang Program,Grant/Award Number:20PJ1411500。
