Isostructural Transition of MgB2 Under High Pressure
SUN Li-Ling1, T. Kikegawa2, WU Qi1, ZHAN Zai-Ji1, WANG Wen-Kui1,3
1Laboratory of Extreme Condition Physics, Institute of Photon Factory, Institute for Materials Structure Science, High Energy Accelerator Organization, Tsukuba, 355-0801, Japan
2College of Material Science and Chemical Engineering, Yanshan University, Qinhuangdao 066004
Isostructural Transition of MgB2 Under High Pressure
SUN Li-Ling1;T. Kikegawa2;WU Qi1;ZHAN Zai-Ji1;WANG Wen-Kui1,3
1Laboratory of Extreme Condition Physics, Institute of Photon Factory, Institute for Materials Structure Science, High Energy Accelerator Organization, Tsukuba, 355-0801, Japan
2College of Material Science and Chemical Engineering, Yanshan University, Qinhuangdao 066004
Abstract： The high-pressure behaviour of superconductor MgB2 with hexagonal structure has been investigated by the in-situ synchrotron radiation x-ray diffraction method under pressures up to 42.2GPa 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 to 30.2 GPa. A split of Raman spectrum was also observed. The jump of compression curve and Raman spectrum are ascribed to an isostructural transition in MgB2 at the pressure of 30.2GPa.
SUN Li-Ling;T. Kikegawa;WU Qi;ZHAN Zai-Ji;WANG Wen-Kui;. Isostructural Transition of MgB2 Under High Pressure[J]. 中国物理快报, 2001, 18(10): 1401-1403.
SUN Li-Ling, T. Kikegawa, WU Qi, ZHAN Zai-Ji, WANG Wen-Kui,. Isostructural Transition of MgB2 Under High Pressure. Chin. Phys. Lett., 2001, 18(10): 1401-1403.
2001, Vol. 18 
