Isostructural Transition of MgB_(2) Under High Pressure  

作　　者：Sun Li-ling TKikegawa WU Qi ZHAN Zai-ji WANG Wen-Kui 孙力玲;TKikegawa;吴奇;战再吉;王文魁(Laboratory of Extreme Condition Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100080;Photon Factory,Institute for Materials Structure Science,High Energy Accelerator Organization,Tsukuba,355-0801,Japan;College of Material Science and Chemical Engineering,Yanshan University,Qinhuangdao 066004)

机构地区：[1]Laboratory of Extreme Condition Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100080 [2]Photon Factory,Institute for Materials Structure Science,High Energy Accelerator Organization,Tsukuba,355-0801,Japan [3]College of Material Science and Chemical Engineering,Yanshan University,Qinhuangdao 066004

出　　处：《Chinese Physics Letters》2001年第10期1401-1403,共3页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No.10004014;the synchrotron radiation experiments were carried out under Approval No.2001PF-03 of the Photon Factory.

摘　　要：The high-pressure behaviour of the superconductor MgB_(2) with a hexagonal structure has been investigated by the in situ synchrotron radiation x-ray diffraction method under pressures up to 42.2 GPa in a diamond anvil cell. An abrupt decrease of about 7% in the unit cell volume of this material occurs in the pressure range of 26.3-30.2 GPa. A split of the Raman spectrum was also observed. The jump of the compression curve and Raman spectrum are ascribed to an isostructural transition in MgB_(2 ) at a pressure of 30.2 GPa.

关 键 词：STRUCTURAL TRANSITION HEXAGONAL 

分 类 号：G63[文化科学—教育学]