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

作者机构：Laboratory of Extreme Condition PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing 100080 Photon FactoryInstitute for Materials Structure ScienceHigh Energy Accelerator OrganizationTsukuba355-0801Japan College of Material Science and Chemical EngineeringYanshan UniversityQinhuangdao 066004 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2001年第18卷第10期

页      面：1401-1403页

核心收录：

学科分类：0401[教育学-教育学] 04[教育学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0704[理学-天文学] 

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 

主　　题：structural Transition hexagonal 

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.