Room-Temperature Magnetic Phase Transition in an Electrically Tuned van der Waals Ferromagnet

被引:10
作者
Tan, Cheng [1 ,4 ]
Liao, Ji-Hai [2 ]
Zheng, Guolin [3 ]
Algarni, Meri [4 ,5 ]
Lin, Jia-Yi [2 ]
Ma, Xiang [6 ]
Mayes, Edwin L. H. [7 ]
Field, Matthew R. [7 ]
Albarakati, Sultan [4 ,8 ]
Panahandeh-Fard, Majid [4 ]
Alzahrani, Saleh [4 ]
Wang, Guopeng [9 ]
Yang, Yuanjun [1 ]
Culcer, Dimitrie [10 ,11 ]
Partridge, James [4 ]
Tian, Mingliang [3 ,9 ]
Xiang, Bin [6 ]
Zhao, Yu-Jun [2 ]
Wang, Lan [1 ,4 ]
机构
[1] Hefei Univ Technol, Sch Phys, Lab Lowdimens Magnet & Spintron Devices, Hefei 230009, Anhui, Peoples R China
[2] South China Univ Technol, Dept Phys, Guangzhou 510640, Peoples R China
[3] Chinese Acad Sci, High Magnet Field Lab, Anhui Prov Key Lab Condensed Matter Phys Extreme C, Hefei 230031, Anhui, Peoples R China
[4] RMIT Univ, Sch Sci, ARC Ctr Excellence Future Low Energy Elect Technol, Melbourne, Vic 3001, Australia
[5] Al Baha Univ, Fac Sci, Phys Dept, Alaqiq 65779, Saudi Arabia
[6] Univ Sci & Technol China, Dept Mat Sci & Engn, Hefei Natl Lab Phys Sci Microscale, CAS Key Lab Mat Energy Convers, Hefei 230026, Anhui, Peoples R China
[7] RMIT Univ, RMIT Microscopy & Microanal Facil, Melbourne, Vic 3000, Australia
[8] Univ Jeddah, Fac Sci & Arts, Phys Dept, POB 80200, Khulais 21589, Saudi Arabia
[9] Anhui Univ, Sch Phys & Mat Sci, Dept Phys, Hefei 230601, Anhui, Peoples R China
[10] Univ New South Wales, Sch Phys, Sydney, NSW 2052, Australia
[11] Univ New South Wales, ARC Ctr Excellence Future Low Energy Elect Technol, UNSW Node, Sydney, NSW 2052, Australia
基金
中国国家自然科学基金; 澳大利亚研究理事会;
关键词
SPINTRONICS;
D O I
10.1103/PhysRevLett.131.166703
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Finding tunable van der Waals (vdW) ferromagnets that operate at above room temperature is an important research focus in physics and materials science. Most vdW magnets are only intrinsically magnetic far below room temperature and magnetism with square-shaped hysteresis at room temperature has yet to be observed. Here, we report magnetism in a quasi-2D magnet Cr1.2Te2 observed at room temperature (290 K). This magnetism was tuned via a protonic gate with an electron doping concentration up to 3.8 x 1021 cm-3. We observed nonmonotonic evolutions in both coercivity and anomalous Hall resistivity. Under increased electron doping, the coercivities and anomalous Hall effects (AHEs) vanished, indicating a doping-induced magnetic phase transition. This occurred up to room temperature. DFT calculations showed the formation of an antiferromagnetic (AFM) phase caused by the intercalation of protons which induced significant electron doping in the Cr1.2Te2. The tunability of the magnetic properties and phase in room temperature magnetic vdW Cr1.2Te2 is a significant step towards practical spintronic devices.
引用
收藏
页数:7
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