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High pressure X-ray diffraction study of CaMnO3 perovskite |
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| Authors: | LIU Ying-Xin JIANG Jian-Zhong Kikegawa Takumi SHI Guang-Hai |
| 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. |
| Keywords: | CaMnO3 high-pressure structure phase transition X-ray diffraction |
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