中国物理B ›› 2016, Vol. 25 ›› Issue (4): 46401-046401.doi: 10.1088/1674-1056/25/4/046401

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Structure phase transformation and equation of state of cerium metal under pressures up to 51 GPa

Ce Ma(马策), Zuo-Yong Dou(窦作勇), Hong-Yang Zhu(祝洪洋), Guang-Yan Fu(付广艳), Xiao Tan(谈笑), Bin Bai(白彬), Peng-Cheng Zhang(张鹏程), Qi-Liang Cui(崔啟良)   

  1. 1 Science and Technology on Surface Physics and Chemistry Laboratory, P. O. Box No. 9-35, Huafengxincun, Jiangyou 621908, China;
    2 State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China
  • 收稿日期:2015-09-24 修回日期:2015-12-04 出版日期:2016-04-05 发布日期:2016-04-05
  • 通讯作者: Peng-Cheng Zhang, Qi-Liang Cui E-mail:zpc113@sohu.com;cql@jlu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. NSAF.U1330115) and the National Major Scientific Instrument and Equipment Development Project of China (Grant No. 2012YQ130234).

Structure phase transformation and equation of state of cerium metal under pressures up to 51 GPa

Ce Ma(马策)1, Zuo-Yong Dou(窦作勇)1, Hong-Yang Zhu(祝洪洋)2, Guang-Yan Fu(付广艳)1, Xiao Tan(谈笑)1, Bin Bai(白彬)1, Peng-Cheng Zhang(张鹏程)1, Qi-Liang Cui(崔啟良)2   

  1. 1 Science and Technology on Surface Physics and Chemistry Laboratory, P. O. Box No. 9-35, Huafengxincun, Jiangyou 621908, China;
    2 State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China
  • Received:2015-09-24 Revised:2015-12-04 Online:2016-04-05 Published:2016-04-05
  • Contact: Peng-Cheng Zhang, Qi-Liang Cui E-mail:zpc113@sohu.com;cql@jlu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. NSAF.U1330115) and the National Major Scientific Instrument and Equipment Development Project of China (Grant No. 2012YQ130234).

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摘要： This study presents high pressure phase transitions and equation of states of cerium under pressures up to 51 GPa at room temperature. The angle-dispersive x-ray diffraction experiments are carried out using a high energy synchrotron x-ray source. The bulk moduli of high pressure phases of cerium are calculated using the Birch-Murnaghan equation. We discuss and correct several previous controversial conclusions, which are caused by the measurement accuracy or personal explanation. The c/a axial ratio of ε-Ce has a maximum value at about 29 GPa, i.e., c/a ≈ 1.690.

关键词: cerium, equation of state, high pressure, phase transition

Abstract: This study presents high pressure phase transitions and equation of states of cerium under pressures up to 51 GPa at room temperature. The angle-dispersive x-ray diffraction experiments are carried out using a high energy synchrotron x-ray source. The bulk moduli of high pressure phases of cerium are calculated using the Birch-Murnaghan equation. We discuss and correct several previous controversial conclusions, which are caused by the measurement accuracy or personal explanation. The c/a axial ratio of ε-Ce has a maximum value at about 29 GPa, i.e., c/a ≈ 1.690.

Key words: cerium, equation of state, high pressure, phase transition

中图分类号:  (Equations of state of pure metals and alloys)

  • 64.30.Ef