Isostructural Transition of MgB_(2) Under High Pressure
同构的二硼化镁在高压下过渡作者机构: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.