中国物理B ›› 2021, Vol. 30 ›› Issue (10): 107502-107502.doi: 10.1088/1674-1056/ac041f

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Spin-phonon coupling in van der Waals antiferromagnet VOCl

Wen-Jun Wang(王文君)1,2, Xi-Tong Xu(许锡童)1,3, Jie Shen(沈洁)1,2, Zhe Wang(王哲)1,2, Shi-Le Zhang(张仕乐)1, and Zhe Qu(屈哲)1,3,†   

  1. 1 Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences, Hefei 230031, China;
    2 Science Island Branch of Graduate School, University of Science and Technology of China, Hefei 230026, China;
    3 CAS Key Laboratory of Photovoltaic and Energy Conservation Materials, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences, Hefei 230031, China
  • 收稿日期:2021-02-11 修回日期:2021-03-08 接受日期:2021-05-24 发布日期:2021-09-17
  • 通讯作者: Zhe Qu E-mail:zhequ@hmfl.ac.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. U2032213, U1832214, and 11774352).

Spin-phonon coupling in van der Waals antiferromagnet VOCl

Wen-Jun Wang(王文君)1,2, Xi-Tong Xu(许锡童)1,3, Jie Shen(沈洁)1,2, Zhe Wang(王哲)1,2, Shi-Le Zhang(张仕乐)1, and Zhe Qu(屈哲)1,3,†   

  1. 1 Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences, Hefei 230031, China;
    2 Science Island Branch of Graduate School, University of Science and Technology of China, Hefei 230026, China;
    3 CAS Key Laboratory of Photovoltaic and Energy Conservation Materials, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences, Hefei 230031, China
  • Received:2021-02-11 Revised:2021-03-08 Accepted:2021-05-24 Published:2021-09-17
  • Contact: Zhe Qu E-mail:zhequ@hmfl.ac.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. U2032213, U1832214, and 11774352).

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 TN, 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.

关键词: vdW material, 2D magnetism, Raman spectroscopy, spin-phonon coupling

Abstract: 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 TN, 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.

Key words: vdW material, 2D magnetism, Raman spectroscopy, spin-phonon coupling

中图分类号:  (Magnetomechanical effects, magnetostriction)

  • 75.80.+q
78.30.-j (Infrared and Raman spectra) 63.20.-e (Phonons in crystal lattices) 96.15.Gh (Magnetic field and magnetism)