Chin. Phys. Lett.  2002, Vol. 19 Issue (1): 120-123    DOI:
Original Articles |
Enhanced MgB2 Superconductivity Under High Pressure
LIU Zhen-Xing;JIN Chang-Qing;YOU Jiang-Yang;LI Shao-Chun;ZHU Jia-Lin;YU Ri-Cheng;LI Feng-Ying;WANG Ru-Ju;SU Shao-Kui
Laboratory for extreme condition physics, Institute of Physics, and Beijing High Pressure Research Center, Chinese Academy of Sciences, Beijing 100080
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LIU Zhen-Xing, JIN Chang-Qing, YOU Jiang-Yang et al  2002 Chin. Phys. Lett. 19 120-123
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Abstract We report on in situ high-pressure studies up to 1.0 GPa on the MgB2 superconductor which was high-pressure synthesized. The as-prepared sample is of high quality in terms of sharp superconducting transition (Tc) at 39 K from the magnetic measurements. The in situ high-pressure measurements were carried out using a Be-Cu piston-cylinder-type instrument with the mixed oil as the pressure transmitting medium which warrants a quasi-hydrostatic pressure environment at low temperature. The superconducting transitions were measured by using the electrical conductance method. It is found that Tc increases more than 1 K with pressure in the low-pressure range, before the Tc value decreases with the further increase of the pressure.
Keywords: 74.62.-c      74.62.Fj      81.40.Vw     
Published: 01 January 2002
PACS:  74.62.-c (Transition temperature variations, phase diagrams)  
  74.62.Fj (Effects of pressure)  
  81.40.Vw (Pressure treatment)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2002/V19/I1/0120
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LIU Zhen-Xing
JIN Chang-Qing
YOU Jiang-Yang
LI Shao-Chun
ZHU Jia-Lin
YU Ri-Cheng
LI Feng-Ying
WANG Ru-Ju
SU Shao-Kui
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