Enhanced MgB<suB>2</suB> Superconductivity Under High Pressure

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 (T_c) 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 T_c increases more than 1 K with pressure in the low-pressure range, before the T_c 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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