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Hydrostatic Pressure Dependence of the Superconducting and Structural Properties of MgB2

J. S. Schilling·J. D. Jorgensen·D. G. Hinks·S. Deemyad·J. Hamlin·C. W. Looney·T. Tomita
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Abstract

In this paper we report parallel in situ neutron powder diffraction and Tc(P) measurements versus pressure on the same MgB2 sample in a He-gas apparatus to 0.6 GPa; in addition, we present Tc(P) measurements in a helium-loaded diamond-anvil-cell to 20 GPa on the same sample. Our results are compared with those of other groups. The high precision achieved in these measurements allows a quantitative evaluation of the change in Tc as a function of the changes in structure. Our results are consistent with electron-phonon pairing in MgB2.

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J. S. Schilling, J. D. Jorgensen, D. G. Hinks, S. Deemyad, J. Hamlin, C. W. Looney, T. Tomita. 2001-10-12. Hydrostatic Pressure Dependence of the Superconducting and Structural Properties of MgB2. https://arxiv.org/abs/cond-mat/0110268

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