中国物理B ›› 2022, Vol. 31 ›› Issue (4): 46502-046502.doi: 10.1088/1674-1056/ac3393

• • 上一篇    下一篇

Near-zero thermal expansion in β-CuZnV2O7 in a large temperature range

Yaguang Hao(郝亚光), Hengli Xie(谢恒立), Gaojie Zeng(曾高杰), Huanli Yuan(袁焕丽), Yangming Hu(胡杨明), Juan Guo(郭娟), Qilong Gao(高其龙), Mingju Chao(晁明举), Xiao Ren(任霄), and Er-Jun Liang(梁二军)   

  1. Key Laboratory of Materials Physics of Ministry of Education, and School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, China
  • 收稿日期:2021-09-18 修回日期:2021-10-19 接受日期:2021-10-27 出版日期:2022-03-16 发布日期:2022-03-16
  • 通讯作者: Xiao Ren, Er-Jun Liang E-mail:rxphy@zzu.edu.cn;ejliang@zzu.edu.cn
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (Grant Nos. 11874328, 12004339, 11574276, and 21905252), the China Postdoctoral Science Foundation (Grant Nos. 2018M640679, 2019T120629, and 2019M652558), and the Zhongyuan Academician Foundation (Grant No. ZYQR201810163).

Near-zero thermal expansion in β-CuZnV2O7 in a large temperature range

Yaguang Hao(郝亚光), Hengli Xie(谢恒立), Gaojie Zeng(曾高杰), Huanli Yuan(袁焕丽), Yangming Hu(胡杨明), Juan Guo(郭娟), Qilong Gao(高其龙), Mingju Chao(晁明举), Xiao Ren(任霄), and Er-Jun Liang(梁二军)   

  1. Key Laboratory of Materials Physics of Ministry of Education, and School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, China
  • Received:2021-09-18 Revised:2021-10-19 Accepted:2021-10-27 Online:2022-03-16 Published:2022-03-16
  • Contact: Xiao Ren, Er-Jun Liang E-mail:rxphy@zzu.edu.cn;ejliang@zzu.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (Grant Nos. 11874328, 12004339, 11574276, and 21905252), the China Postdoctoral Science Foundation (Grant Nos. 2018M640679, 2019T120629, and 2019M652558), and the Zhongyuan Academician Foundation (Grant No. ZYQR201810163).

摘要: We report a new type of near-zero thermal expansion material β-CuZnV2O7 in a large temperature range from 173 K to 673 K. It belongs to a monoclinic structure (C2/c space group) in the whole temperature range. No structural phase transition is observed at atmospheric pressure based on the x-ray diffraction and Raman experiment. The high-pressure Raman experiment demonstrates that two structural phase transitions exist at 0.94 GPa and 6.53 GPa, respectively. The mechanism of negative thermal expansion in β-CuZnV2O7 is interpreted by the variations of the angles between atoms intuitively and the phonon anharmonicity intrinsically resorting to the negative Grüneisen parameter.

关键词: negative thermal expansion materials, β-CuZnV2O7, expansion mechanism, Raman spectrum

Abstract: We report a new type of near-zero thermal expansion material β-CuZnV2O7 in a large temperature range from 173 K to 673 K. It belongs to a monoclinic structure (C2/c space group) in the whole temperature range. No structural phase transition is observed at atmospheric pressure based on the x-ray diffraction and Raman experiment. The high-pressure Raman experiment demonstrates that two structural phase transitions exist at 0.94 GPa and 6.53 GPa, respectively. The mechanism of negative thermal expansion in β-CuZnV2O7 is interpreted by the variations of the angles between atoms intuitively and the phonon anharmonicity intrinsically resorting to the negative Grüneisen parameter.

Key words: negative thermal expansion materials, β-CuZnV2O7, expansion mechanism, Raman spectrum

中图分类号:  (Thermal expansion; thermomechanical effects)

  • 65.40.De
61.66.-f (Structure of specific crystalline solids) 62.50.-p (High-pressure effects in solids and liquids) 33.20.Fb (Raman and Rayleigh spectra (including optical scattering) ?)