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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 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 |
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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.
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Received: 24 September 2015
Revised: 04 December 2015
Accepted manuscript online:
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PACS:
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64.30.Ef
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(Equations of state of pure metals and alloys)
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Fund: 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). |
Corresponding Authors:
Peng-Cheng Zhang, Qi-Liang Cui
E-mail: zpc113@sohu.com;cql@jlu.edu.cn
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Cite this article:
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) Structure phase transformation and equation of state of cerium metal under pressures up to 51 GPa 2016 Chin. Phys. B 25 046401
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