engleski

The increase in T(c) for MgB(2) superconductor under high pressure

We report in situ high-pressure studies up to 1.0 GPa on MgB(2) superconductor which had been synthesized at high pressure. The as-prepared sample is of high quality as regards having a sharp superconducting transition (T(C)) at 39 K. The in situ high-pressure measurements were carried out using a Be-Cu piston-cylinder-type instrument with a mixed oil as the pressure- transmitting medium, which provides a quasi- hydrostatic pressure environment at low temperature. The superconducting transitions were measured using the electrical conductance method. It is found that T, increases with pressure in the initial pressure range, leading to a parabolic- like T(C)-P evolution.

hole superconductivity ; magnesium diboride ; 39 K

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