Spin-phonon coupling in van der Waals antiferromagnet VOCl*

被引：4
|
作者：
Wang, Wen-Jun [1 ,2 ]
Xu, Xi-Tong [1 ,3 ]
Shen, Jie [1 ,2 ]
Wang, Zhe [1 ,2 ]
Zhang, Shi-Le [1 ]
Qu, Zhe [1 ,3 ]
机构：
[1] Chinese Acad Sci, Hefei Inst Phys Sci, High Field Magnet Lab, Anhui Prov Key Lab Condensed Matter Phys Extreme, Hefei 230031, Peoples R China
[2] Univ Sci & Technol China, Sci Isl Branch, Grad Sch, Hefei 230026, Peoples R China
[3] Chinese Acad Sci, Hefei Inst Phys Sci, CAS Key Lab Photovolta & Energy Conservat Mat, Hefei 230031, Peoples R China
来源：
CHINESE PHYSICS B | 2021年 / 30卷 / 10期
基金：
中国国家自然科学基金;
关键词：
vdW material; 2D magnetism; Raman spectroscopy; spin-phonon coupling; MAGNETISM; FERROMAGNETISM; FLUCTUATIONS; BEHAVIOR; METALS;
D O I：
10.1088/1674-1056/ac041f
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We report magnetization and Raman spectroscopy study on single crystals of VOCl, a van der Waals antiferromagnetic material. Magnetization measurement confirms an antiferromagnetic transition at 79 K and a magnetic easy axis along crystallographic a direction. The temperature-dependent Raman spectrum reveals five peaks at 30 K. Below the Neel temperature T (N), the Raman-active modes 247 cm(-1) and 404 cm(-1) remarkably deviate from the standard Boltzmann function, which is ascribed to the strong magnetoelastic coupling between spins and phonons. We further observe an anomaly in 383 cm(-1) mode at around 150 K. This coincides with the broad maximum in VOCl's magnetic susceptibility, suggesting a development of short-ranged magnetic order at this temperature.
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收藏
页数：5
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