Phase-pure two-dimensional Fe_(X)GeTe_(2) magnets with near-room-temperature Tc

作     者：Govindan Kutty Rajendran Nair Zhaowei Zhang Fuchen Hou§ Ali Abdelaziem Xiaodong Xu Steve Wu Qing Yang Nan Zhang Weiqi Li Chao Zhu Yao Wu Heng Weiling Lixing Kang Teddy Salim Jiadong Zhou Lin Ke Junhao Lin Xingji Li Weibo Gao Zheng Liu Govindan Kutty Rajendran Nair;Zhaowei Zhang;Fuchen Hou;Ali Abdelaziem;Xiaodong Xu;Steve Wu Qing Yang;Nan Zhang;Weiqi Li;Chao Zhu;Yao Wu;Heng Weiling;Lixing Kang;Teddy Salim;Jiadong Zhou;Lin Ke;Junhao Lin;Xingji Li;Weibo Gao;Zheng Liu

作者机构：School of Material Science and Engineering50 Nanyang Ave639798Singapore Division of Physics and Applied PhysicsSchool of Physical and Mathematical SciencesNanyang Technological University21 Nanyang Link637371 Singapore Department of PhysicsSouthern University of Science and TechnologyShenzhen 518055China Institute of Materials Research and EngineeringAgency for Science Technology and Research(A*STAR)2 Fusionopolis WaySingapore 138634Singapore School of Material Science and EngineeringSchool of PhysicsHarbin Institute of TechnologyHarbin 150001China Shenzhen Key Laboratory of for Advanced Quantum Functional Materials and DevicesSouthern University of Science and TechnologyShenzhen 518055China National Institute of Laser Enhanced Sciences(NILES)Cairo UniversityGiza 12613Egypt CINTRA CNRS/NTU/THALESUMI3288Research Techno Plaza637553Singapore School of Electrical and Electronic EngineeringNanyang Technological University50 Nanyang Ave639798Singapore 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2022年第15卷第1期

页      面：457-464页

核心收录：

学科分类：08[工学] 081201[工学-计算机系统结构] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：supported from National Research Foundation Singapore programme NRF-CRP22-2019-0007,NRF-CRP22-2019-0004 and NRF-CRP21-2018-0007 supported by the Ministry of Education,Singapore,under its AcRF Tier 3 Programme‘Geometrical Quantum Materials’(MOE2018-T3-1-002),AcRF Tier 2(MOE2019-T2-2-105)and AcRF Tier 1 RG4/17 and RG7/18 We also thank the funding support from National Research foundation(NRF-CRP22-2019-0004) 

主　　题：cascaded space confined chemical vapor deposition(CVD) van der Waals(vdW) ferromagnetism out of plane anisotropy iron germanium telluride terahertz 

摘      要：Two-dimensional(2D)ferromagnets with out-of-plane(OOP)magnetic anisotropy are potential candidates for realizing the next-generation memory devices with ultra-low power consumption and high storage ***,a scalable approach to synthesize 2D magnets with OOP anisotropy directly on the complimentary metal-oxide semiconductor(CMOS)compatible substrates has not yet been mainly explored,which hinders the practical application of 2D *** work demonstrates a cascaded space confined chemical vapor deposition(CS-CVD)technique to synthesize 2D FexGeTe_(2) *** weight fraction of iron(Fe)in the precursor controls the phase purity of the as-grown *** a result,high-quality Fe_(3)GeTe_(2) and Fe_(5)GeTe_(2) flakes have been grown selectively using the CS-CVD *** temperature(Tc)of the as-grown FexGeTe2 can be up to-280 K,nearly room *** thickness and temperature-dependent magnetic studies on the Fe_(5)GeTe_(2) reveal a 2D Ising to 3D XY ***,Terahertz spectroscopy experiments on Fe_(5)GeTe_(2) display the highest conductivity among other FexGeTe_(2) 2D *** results of this work indicate a scalable pathway for the direct growth and integration of 2D ternary magnets on CMOS-based substrates to develop spintronic memory devices.