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Enhanced MgB2 Superconductivity Under High Pressure 被引量:1
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作者 刘振兴 革常青 《Chinese Physics Letters》 SCIE CAS CSCD 2002年第1期120-121,共2页
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PHASE TRANSITION IN LAYERED PEROVSKITE LIKE MANGANATE Ca3Mn2O7 UNDER HIGH PRESSURE
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作者 J.L.ZHU L.C.CHEN +3 位作者 R.C.YU F.Y.LI J.LIU C.Q.JIN 《Beijing Synchrotron Radiation Facility》 2001年第2期180-186, ,共7页
In situ high pressure energy dispersive X-ray diffraction measurements on layered perovskite-like manganate Ca3Mn2O7 under pressures up to 35 GPa have been Performed by using diamond anvil cell with synchrotron radiat... In situ high pressure energy dispersive X-ray diffraction measurements on layered perovskite-like manganate Ca3Mn2O7 under pressures up to 35 GPa have been Performed by using diamond anvil cell with synchrotron radiation.The results show that the structure of layered perovskite-like manganate Ca3Mn2O7 is unstable under pressure due to the easy compression of NaCl-type blocks.The structure of Ca3Mn2O7 underwent two phase transitions under pressures in the range of 0-35GPa.One was at about 1.3GPa with the crystal structure changing from tetragonalt go orthorhombic.The other was at about 9.5GPa with the crystal structure changing form orthorhombic back to another tetragonal. 展开更多
关键词 高压 X射线衍射 Ca3Mn2O7 钙钛矿结构 锰酸盐晶体 相变 晶体结构
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