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Pressure dependence of Tc in the MgB2 superconductor as probed by resistivity measurements

E. Saito·T. Taknenobu·T. Ito·Y. Iwasa·K. Prassides
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Abstract

High-pressure resistivity experiments were performed on the recently discovered superconductor, MgB2. Tc decreases quasi-linearly with applied pressure to 1.4 GPa at a rate of -2.0(1) K/GPa, which is somewhat larger than that derived from recently-reported ac susceptibility measurements. The reduction of Tc is consistent with the BCS picture, in a similar way to the C60-based superconductors. Taking into account the pressure dependence of the unit cell volume, V, the volume coefficient of Tc, d(lnTc)/dV is significantly large.

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E. Saito, T. Taknenobu, T. Ito, Y. Iwasa, K. Prassides. 2001-02-28. Pressure dependence of Tc in the MgB2 superconductor as probed by resistivity measurements. https://doi.org/10.1088/0953-8984%2F13%2F12%2F102

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