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High pressure X-ray diffraction study of CaMnO3 perovskite

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【作者】 刘迎新； 秦善； 蒋建中； Kikegawa Takumi； 施光海；

【Author】 LIU Ying-Xin1,2 QIN Shan2;1) JIANG Jian-Zhong3 Kikegawa Takumi4 SHI Guang-Hai1 1 State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Beijing 100083,China 2 Department of Geology and Key Laboratory of Orogenic Belts and Crustal Evolution of MOE,Peking University,Beijing 100871,China 3 International Center for New-Structured Materials(ICNSM),Zhejiang University and Laboratory of New-Structured Materials,Department of Materials Science and Engineering,Zhejiang University,Hangzhou 310027,China 4 Institute of Materials Structure Science,High Energy Accelerator Research Organization,Tsukuba 3050801,Japan

【机构】 State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences； Department of Geology and Key Laboratory of Orogenic Belts and Crustal Evolution of MOE,Peking University； International Center for New-Structured Materials(ICNSM),Zhejiang University and Laboratory of New-Structured Materials； Department of Materials Science and Engineering,Zhejiang University； Institute of Materials Structure Science,High Energy Accelerator Research Organization；

【摘要】 Using a diamond anvil cell device and synchrotron radiation,the in-situ high-pressure structure of CaMnO3 has been investigated.In the pressure up to 36.5 GPa,no pressure-induced phase transition is observed.The pressure dependence on the lattice parameters of CaMnO3 is reported,and the relationship of the axial compression coefficients is βa > βc > βb.The isothermal bulk modulus K298=224(25) GPa is also obtained by fitting the pressure-volume data using the Murnaghan equation of state.

【Abstract】 Using a diamond anvil cell device and synchrotron radiation,the in-situ high-pressure structure of CaMnO3 has been investigated.In the pressure up to 36.5 GPa,no pressure-induced phase transition is observed.The pressure dependence on the lattice parameters of CaMnO3 is reported,and the relationship of the axial compression coefficients is βa > βc > βb.The isothermal bulk modulus K298=224(25) GPa is also obtained by fitting the pressure-volume data using the Murnaghan equation of state.

【关键词】 CaMnO3； high-pressure； structure； phase transition； X-ray diffraction；
【Key words】 CaMnO3； high-pressure； structure； phase transition； X-ray diffraction；
【基金】 Supported by National Natural Science Foundation of China (40972029)
  • 【文献出处】 中国物理C ,Chinese Physics C , 编辑部邮箱 ,2010年07期
  • 【分类号】P575.5
  • 【被引频次】2
  • 【下载频次】100
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