Magnetic Order and Its Interplay with Structure Phase Transition in van der Waals Ferromagnet VI3

被引：17
|
作者：
Hao, Yiqing [1 ,2 ]
Gu, Yiqing [1 ,2 ,3 ]
Gu, Yimeng [1 ,2 ,3 ]
Feng, Erxi [4 ]
Cao, Huibo [4 ]
Chi, Songxue [4 ]
Wu, Hua [1 ,2 ,3 ,5 ]
Zhao, Jun [1 ,2 ,3 ,6 ,7 ]
机构：
[1] Fudan Univ, State Key Lab Surface Phys, Shanghai 200433, Peoples R China
[2] Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China
[3] Shanghai Qi Zhi Inst, Shanghai 200232, Peoples R China
[4] Oak Ridge Natl Lab, Neutron Scattering Div, Oak Ridge, TN 37831 USA
[5] Fudan Univ, Lab Computat Phys Sci MOE, Shanghai 200433, Peoples R China
[6] Fudan Univ, Inst Nanoelect & Quantum Comp, Shanghai 200433, Peoples R China
[7] Shanghai Res Ctr Quantum Sci, Shanghai 201315, Peoples R China
来源：
CHINESE PHYSICS LETTERS | 2021年 / 38卷 / 09期
基金：
中国国家自然科学基金;
关键词：
DISCOVERY; CRYSTAL; STATES;
D O I：
10.1088/0256-307X/38/9/096101
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Van der Waals magnet VI3 demonstrates intriguing magnetic properties that render it great for use in various applications. However, its microscopic magnetic structure has not been determined yet. Here, we report neutron diffraction and susceptibility measurements in VI3 that revealed a ferromagnetic order with the moment direction tilted from the c-axis by similar to 36 degrees at 4 K. A spin reorientation accompanied by a structure distortion within the honeycomb plane is observed, before the magnetic order completely disappears at T (C) = 50 K. The refined magnetic moment of similar to 1.3 mu (B) at 4 K is much lower than the fully ordered spin moment of 2 mu (B)/V3+, suggesting the presence of a considerable orbital moment antiparallel to the spin moment and strong spin-orbit coupling in VI3. This results in strong magnetoelastic interactions that make the magnetic properties of VI3 easily tunable via strain and pressure.
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页数：5
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